Seto Kaiba is the majority shareholder and CEO of his own multi-national company, KaibaCorp, who aims to become the world's greatest player of Duel Monsters, by gaining the 3 of 4 "Blue-Eyes White Dragon" cards and destroying the fourth. To accomplish this goal, he must defeat his arch-rival, Yugi Muto. He is largely considered an anti-hero, as his motives are usually ego-centric and his relationships with the protagonists are antagonistic, but in several cases his actions are towards a good cause.
Among one of the recurring plots is Seto Kaiba being forced to deal with either people adversely affected by Gozaburo Kaiba's actions, wanting to take their revenge on Kaiba himself, or people from within KaibaCorp attempting to take over the corporation.
Kaiba is based on a collectible card games player whom a friend of Kazuki Takahashi met. Takahashi's friend asked this person to teach him how to play a card game, but he replied "Hmp! Come back when you've collected 10,000 cards". The story made Takahashi mad, but thought the player would make a good character.
Takahashi had originally considered making Kaiba the heir to a gaming company and have him challenge Yugi using strange games he continuously comes up with, but on short notice, ended up having him play Duel Monsters a second time. He also reconstructed Kaiba to make him a semi-lead character and rival to Yugi.
Kaiba's character design was overseen by Kazuki Takahashi. His usual outfit from the second series anime consists of a long white sleeveless KaibaCorp-designed coat featuring shoulder pads and a raised studded collar, with black sleeves from his shirt coming out from under. He has extra belts in pairs strapped around his upper arms and shins. He often wears a KaibaCorp Duel Disk on his left arm.
In the first series anime, Kaiba has green hair, while in the manga, Toei's Yu-Gi-Oh! movie, and the second series, Yu-Gi-Oh! Duel Monsters, Kaiba has brown hair.
- See: Seto Kaiba (manga)
First series anime biography
Second series anime biography
At a young age, Seto and his younger brother Mokuba's parents both died. Their relatives took everything from their will and sent Seto and Mokuba to the orphanage. (In the English version, it simply said that their parents disappeared and there was no mention of their relatives).
On their first day at the orphanage, Seto comforted Mokuba, who was crying. He told him that he will be his father from there on and vowed to protect him no matter what. He advised Mokuba to always stay on his guard, as he will be finished if he shows any weakness.
Together at the orphanage, Seto and Mokuba would often play games, including chess, which Seto always won, but still encouraged Mokuba. When Mokuba was bullied by other kids, Seto would stick-up for him and even jumped on another kid to retrieve a toy he'd stolen from Mokuba.
One day they made a model theme park in the sandpit. Seto said that one day they would open real theme parks around the world, that everyone would want to visit and orphans would be allowed in free of charge.
The former head of KaibaCorp, Gozaburo Kaiba, arrived at the orphanage to perform a publicity stunt. Seto, who was 10 at the time (12 in the English version), saw the chance to challenge him to a game of chess, with the stakes being that Gozaburo was to adopt Seto and Mokuba together, should Seto win. Seto won since he had already studied Gozaburo's chess methods. Gozaburo then adopted both brothers.
When he adopted Seto, Gozaburo planned to only use his body as a shell for his son, Noah. Noah had been injured in an accident and had his mind uploaded into a virtual world, as he was unable to survive in his real body. Gozaburo also used Seto to motivate Noah to work harder. However Seto proved to be more capable of running KaibaCorp than Noah. Gozaburo abandoned his idea to transfer Noah's mind into Seto's body and focused his energies in training Seto. Gozaburo forced Seto into a rigorously accelerated school program.
When Gozaburo asked Seto what he planned to do with KaibaCorp after he inherited it, he said that he planned to build a Kaiba Land theme park for underprivileged children. Gozaburo called this boring, but Seto protested that games purify the soul. Gozaburo was not interested as games cannot be used to rule and ordered Hobson to confiscate all of Seto and Mokuba's toys, refusing to let Seto touch toys until he knew how to rule. (In the English version, Seto couldn't keep up with the pace Gozaburo wanted him to study at. Gozaburo disallowed him from having weekends off. As Gozaburo said that discipline is the only way to crush your enemies, Seto protested that he has no enemies. Gozaburo insisted that he does and he must learn that he can't even trust Gozaburo. He ordered Hobson to confiscate all of Seto's toys, so that they won't distract him from his studies.)
Mokuba hid Seto's Duel Monsters Deck in a hollowed-out book, including a drawing of a "Blue-Eyes White Dragon". He also left a note saying that their new family couldn't take everything away from them. Kaiba stepped out onto a balcony and vowed to get a real "Blue-Eyes White Dragon", one day.
Gozaburo brought Seto and Mokuba to a party he threw. Seto had achieved a name for himself as a prodigy. A German man introduced his son as a prodigy too. The son, Zigfried von Schroeder, whispered to Seto asking if they should spice things up. Then the lights began to flicker on and off. Gozaburo was astonished as the system was protected by a fail safe system. Zigfried whispered to Kaiba that he dabbles in technology. He said that spending all your time alone causes you to tinker in your own projects and Seto must understand.
On Seto's birthday, he was given a 2% share of KaibaCorp (in the English anime, 10 million dollars) and was told that although he could spend the money any way he wished, he must return one hundred times (in the English anime, 10 times) the amount in one year. Seto returned all the money within a single day. He did this by buying 51% shares of a small company that cares for its employees, Seto then made the president buy it back, under threat of it being shut down and leaving the employees jobless.
Seto invented virtual software for playing video games. However, Gozaburo intended to use it for war. Seto confronted him over this, but Gozaburo scolded him again for wanting to play games. Seto was to inherit the company one day, Gozaburo said, and the company is about beating enemies and rising to power, not making toys. Seto called him insane and Gozaburo had his guards take Seto away. Seto called out "Father" as he was dragged away. That was the last time he called Gozaburo "Father".
Not wanting his virtual system to be used by Gozaburo to kill countless people and make a fortune, Seto refused to let himself hand his system over to that evil man. He lost his expectations of Gozaburo, and decided that he would take-over KaibaCorp.
Seto made a deal with The Big Five, where they would try to overthrow Gozaburo. He told the Big Five that Gozaburo didn't give them the respect they deserved and he would treat them better once he becomes in charge.
Together they gained 51% of KaibaCorp. Seto made sure Gozaburo came to know of their plan and accused Mokuba of snitching on them. Seto and Mokuba were briefly turned against each other and Mokuba was given comfort by Gozaburo. Aware of Seto's plan, Gozaburo planned to use his 49% with Mokuba's 2% to overrule Seto. However as Seto planned Mokuba switched back to his side last minute, giving Seto his 2%. With the 51%, Seto was able to take full control of the company. Unable to live with the defeat, Gozaburo committed suicide, but not before he uploaded his mind into Noah's virtual world.
After taking control of KaibaCorp, Seto shifted its economic interest from the manufacturing of weapons of mass destruction to gaming-oriented equipment.
Kaiba didn't give The Big Five the respect or power they had been expecting when they made the deal to overthrow Gozaburo. He refused to provide finance to Crump to build his dream penguin theme park. He told Nesbitt to show his loyality by destroying the military factory on Alcatraz. Once that was done, Kaiba closed the military department and proceeded to build the Duel Tower in its place. He demoted Nesbitt to dispatching material for building the tower.
Kaiba started building an amusement park for orphaned and underprivileged children called Kaiba Land. At the start of the series, only one Kaiba Land had been built, in Domino (in the English version, none of the parks had been built, and Kaiba Land was touted as the KaibaCorp headquarters).
Kaiba began work on creating holographic technology to heighten the experience of playing Duel Monsters.
Maximillion Pegasus invited Kaiba as his special guest to the Intercontinental Duel Monsters Tournament in New York City. Kaiba witnesses Pegasus face Bandit Keith in the finals. At the Duel, Pegasus simply sat in front of Keith for a few seconds, then wrote down some instructions on a piece of paper, which he gave to a beginner, Sam, from the audience to use against Keith. While Sam dueled Keith, Pegasus sat with Kaiba. He hoped Kaiba was "enjoying the tournament so far, even though it must seem so crude to him, unlike the holographic dueling stations KaibaCorp is developing."
Kaiba met with Pegasus to demonstrate a miniature Dueling Arena to a group of businessmen. Zigfried von Schroeder then entered the room disgusted, as he had developed something similar and believed Kaiba's idea belonged to him.
Kaiba inferred that Pegasus must have read Keith's mind in the Duel, so later he began making Duel Disks to combat Pegasus' mind reading strategy. With Duel Disks, players would be able to stand further apart and avoid face-to-face contact, which he hoped would be enough to avoid having his mind read.
At school, Kaiba overheard Yugi Muto talking about a rare card his grandfather, Solomon Muto has. Suspecting it might be the 4th "Blue-Eyes", Kaiba visited Solomon's shop and saw the card. He tried to trade for the card and buy it, but Solomon refused, since the card is of high sentimental value to him. Still determined and sickened by Solomon's attitude, Kaiba kidnapped him and challenged him to a Duel. Kaiba defeated Solomon and overwhelmed him with the holographic technology used in the Duel. As a prize, he took Solomon's "Blue-Eyes". He then called Yugi over to collect his grandfather. Shortly after Yugi arrived, Kaiba tore-up the "Blue-Eyes White Dragon" card in front of him and his friends. Outraged, Yugi dueled Kaiba as Yami Yugi. Yami is put in a tight place after Kaiba Summons all 3 "Blue-Eyes White Dragons", but managed to win by Summoning "Exodia". After winning, Yami inflicted a Mind Crush on Kaiba dispelling his evil half.
After his defeat, Seto dropped out of playing Duel Monsters.
Maximillion Pegasus teamed-up with The Big Five to try to take-over KaibaCorp. They sent two men to Kaiba's office to capture him. Kaiba refused to cooperate, so the henchmen prepared to open fire. However, Kaiba knocked them back with a chair and deflected their gunshots with his briefcase. He jumped out the window of his office, leading them to believe he died. (In the English version, the guns are removed and Kaiba jumped out after refusing to cooperate.) However Kaiba clung onto the side of the cliff and climbed to his safety. In the meantime his Deck was stolen and Mokuba was kidnapped.
Later Kaiba sneaked back into his mansion through a hidden passageway. He entered a hidden computer lab, where he got an update on what Pegasus had done to KaibaCorp. He learned that Mokuba was held prisoner on the Duelist Kingdom island and Pegasus will be given shares of KaibaCorp once Yugi is defeated in the Duelist Kingdom tournament. Kaiba hacked into Pegasus' computer system and found Yugi was dueling an imposter Seto Kaiba, who even had the real Kaiba's Deck. Kaiba infected a "Blue-Eyes White Dragon" Summoned by the imposter with a virus, weakening it and consequently preventing Yugi from losing the Duel.
As soon as he arrived on the island, he bumped into Yugi and his friends. Yugi returned Kaiba's Deck to him and suggested that they stick together as they are all going to Pegasus' castle, but Kaiba declined. Joey Wheeler, who was disgusted by Kaiba's attitude, confronted him, and the two wound-up dueling. Kaiba used the Duel as a chance to test his Duel Disks. Joey foolishly attacked Kaiba's monsters with a barrage of weaker ones, until he Summoned his "Red-Eyes Black Dragon", which Kaiba defeated with "Blue-Eyes White Dragon" and took out the remainder of Joey's Life Points. Kaiba cruelly mocked Joey and called him a loser. before leaving, he told the group about Pegasus' Duel with Keith, so Yugi and Joey know what they are up against.
The next day, Kemo found Kaiba on the island and pointed a gun to his head. However Kaiba jammed the gun with a "Gyakutenno Megami" card. Kaiba pulled the gun from Kemo, injuring his hand. (This scene is removed from the English version.) Kemo lunged at Kaiba, but Kaiba subdued him and ordered him to take them to Mokuba. Kemo took Kaiba to Pegasus' dungeons, but triggered a security alarm, calling for backup. Pegasus, who had already known this would happen insisted they turn off the alarm and goes to the dungeons to meet Kaiba himself.
Kaiba hid on one of the walls and listened-in on a group of Pegasus' guards, who had been unable to find him. The guards decided to go to Mokuba's cell, believing Kaiba will show up there soon. Kaiba leaped down and followed them. Once they arrived at the cell, Kaiba sneaked-up on them and knocked them out. Kaiba was briefly reunited with Mokuba, but was confronted by Pegasus before he could release him. Pegasus used the Millennium Eye to strip Mokuba of his soul, which he trapped in a "Soul Prison" card. Pegasus said that Kaiba must defeat him in a Duel if he wished to free Mokuba. Kaiba was willing to duel on the spot, but Pegasus refused telling Kaiba that he must defeat Yugi in a Duel, before he can do that.
Kaiba confronted Yugi outside the castle and imposed a Duel. Initially Yugi refuses, but he switched to Yami Yugi and accepted. During the Duel, Kaiba Summoned "Blue-Eyes Ultimate Dragon", causing problems for Yami, but Yami fused it with "Mammoth Graveyard", causing it to decay and lose ATK each turn. As Yami was about to win, Kaiba stood-up on the edge of the castle, such that if Yami made another attack, he would fall to his death. Although Yami tried to attack, Yugi took-over and called it off. Kaiba won on the next turn, taking five of Yugi's Star Chips. Combined with the five Pegasus gave him earlier, Kaiba had enough to enter the castle and face Pegasus.
Kaiba got ready to duel Pegasus. He insisted on using the Duel Disks, but Pegasus wasn't too keen. Pegasus accepted under the condition, that Mokuba who is stripped of his soul, held the Duel Disk for him. Kaiba refused to face his brother in such a way and agreed to duel without the Disks. Pegasus defeated Kaiba and also trapped his soul in another "Soul Prison" card.
When Yugi defeated Pegasus, as promised Pegasus freed the souls of Seto and Mokuba Kaiba, along with Solomon Muto.
Kaiba thanked Yugi for saving Mokuba and insisted that have a fair Duel someday to determine who is the better duelist. He gave Yugi and his friends a lift home from the island afterwards.
Kaiba prepared to fire The Big Five for trying to take over KaibaCorp, as well as payment for the suffering through which they had forced him and Mokuba. But the Big Five plead with Kaiba, and gave him the complete virtual reality game as a peace offering. Eager to try out the virtual reality game, Kaiba refrained from immediately firing them decided to test the system. Mokuba advised against it, harboring doubt. Kaiba however assured him otherwise, and continues to experiment with the game.
Inside the game, Kaiba was confronted by a Two-Headed King Rex, which he easily defeated by Summoning "Blue-Eyes White Dragon". However an Armed Ninja ambushed him, taking him by surprise as he had no recollection of programming it. Kaiba attempted to attack it with Blue-Eyes, but a Dragon Capture Jar appeared and trapped the dragon. The Armed Ninja threw a net on Kaiba, capturing him.
Kaiba was taken to the Castle of Dark Illusions and chained to a pillar, where he is held captive by the Witty Phantom. Witty Phantom told Kaiba that he is to be sacrificed to Summon the Mythic Dragon. In an attempt to escape, Kaiba tried to end the simulation, but learned that that function had been disabled.
Mokuba recruited Yugi and Joey to help him in his efforts to rescue Kaiba. Together they go to the castle and Mokuba managed to free Kaiba. Kaiba Summoned a second "Blue-Eyes", which destroyed the phantom. He re-encounters Armed Ninja and the Dragon Capture Jar, but destroyed the jar with "Trap Master" reclaiming his trapped "Blue-Eyes". The two "Blue-Eyes" easily defeated Armed Ninja.
Kaiba had "Blue-Eyes White Dragon" blast a hole in the floor, allowing him and Mokuba to meet-up with Yugi, Joey and Mai. The Big Five congratulated the players on making it to the final level, but Kaiba protested that they stopped the Mythic Dragon from being Summoned, so they have already beaten the game. However the Big Five had reprogrammed the game making them have to face the Mythic Dragon.
The group were sent to a room, where only Dragon-Type monsters are of use. The group had their dragons attack the Mythic Dragon to no avail. The Mythic Dragon started to take out the players and their dragons one by one. Mokuba pushed Kaiba out of the way of one of its blasts, saving Kaiba, but letting himself be taken out. Yugi's persuasion finally got through to Kaiba, who fused his dragons into "Blue-Eyes Ultimate Dragon". Yugi then fuses it with "Black Luster Soldier" to form "Dragon Master Knight", which defeated the Mythic Dragon.
Kaiba and his rescuers returned to the real world, while the Big Five were left trapped in the virtual world.
Ishizu Ishtar invited Kaiba to an Ancient Egypt exhibition. Here she used her Millennium Necklace to show him visions from the past, where a sorcerer, who looks like Kaiba, battled the Nameless Pharaoh, who looks like Yugi, using Duel Monster Spirits. She told him about their most powerful monsters, the Egyptian Gods, which Pegasus made Duel Monsters cards of, but was unable to control their power. She had come into possession of one of the Gods, "Obelisk the Tormentor", while the others were stolen by thieves. She gave Kaiba the card, in exchange for him starting a Duel Monsters tournament to attract the thieves so they may gather the three Gods. Kaiba laughed at the idea of him returning the "Obelisk" card, but Ishizu insisted that he will, as she has foreseen it. Kaiba agreed to host the tournament in the hopes of gathering the three God cards for himself through an ante rule and so he can defeat Yugi, reclaiming his title as World Champion.
Kaiba tested "Obelisk the Tormentor", by dueling a Duel Computer, which was using his Duelist Kingdom Deck. The computer Summoned "Blue-Eyes Ultimate Dragon", but Kaiba defeated it with "Obelisk the Tormentor", whose strength proved too much for the computer, causing it to catch fire.
Kaiba invited duelists he thought to be good enough to participate in the tournament. All players were given the newest version of his Duel Disks. The Rare Hunters, who were not invited, hacked into his computer system to add themselves as participants. Mokuba suggested that they disqualify them, but Kaiba allowed for it. (In the English version, Kaiba had planned to have them hack in all along, so the holders of the Egyptian Gods would enter the tournament.)
Kaiba took part in the tournament himself, leaving his employees monitor other Duels to find the Egyptian God cards.
Kaiba found Koji Nagumo bullying a duelist he just defeated into giving him a second card through the ante rule. Kaiba challenged Koji to a Duel and gave him rare cards to improve his Deck beforehand. Despite this, Kaiba quickly defeated him using "Obelisk the Tormentor".
He spent much of the preliminaries trying to find and defeat Yugi. He bumped into Joey Wheeler in his search, surprised to see him wearing a Duel Disk as he hadn't been invited. Joey challenged Kaiba to a Duel on the spot, but Kaiba received word of a God Card being played and took-off. He found Yugi in a Duel against Strings, who was possessed by Marik Ishtar and using the Egyptian God card "Slifer the Sky Dragon". Seeing Yugi drops to his knees, doubting he can win, Kaiba called down to him, ordering him live up to his reputation and thinking he is the only one who should defeat Yugi.
After Yugi won, Kaiba congratulated him, but said it's a shame Yugi won't have "Slifer the Sky Dragon" for long and challenged him to a Duel. However Marik informed Yugi that his friends had been kidnapped. Yugi postponed the Duel as he must find his friends.
Kaiba followed Yugi and caught-up when Yugi was challenged to a Duel by Lumis and Umbra, who can't decide which of them should face Yugi first. Kaiba appeared and told them to both duel at once in a Tag Duel against him and Yugi. They agree and Kaiba easily defeated both of them at once using "Obelisk the Tormentor". Kaiba took their Locator Cards and handed one to Yugi. He then offered to use KaibaCorp's satellite system to trace the location of Joey's Duel Disk.
As they searched for Yugi's friends, the guys were confronted by Lumis, who showed them that they have kidnapped Mokuba. In order to get Mokuba back, Yugi and Kaiba had to Tag Duel him and Umbra on top of a skyscraper. The Duel was setup such that when a player loses, the glass roof below them shatters sending them to their death. (In the English version, there was a vortex to the Shadow Realm under the glass.) Kaiba's refusal to work as part of a team, initially hindered his and Yugi's performance, while Umbra and Lumis' Decks had been built to work together and prevent the Summoning of the Egyptian Gods. However Kaiba eventually accepted that they must work as a team. He sacrificed his "Blue-Eyes White Dragon" to prevent Yugi from losing and provoked Umbra and Lumis turning them against each other. Yugi and Kaiba worked together to Summon "Obelisk the Tormentor", which defeated Umbra, who used a parachute to save himself. Marik took control of Luma's mind after he surrenderd. Kaiba seized him demanding they release Mokuba. However Marik didn't keep his promise and left Luma fall unconscious. Kaiba took "Masked Beast Des Gardius" and the locator cards from Lumba. He handed Yugi one of the Locator Cards, qualifying them both for the finals.
Despite Marik's refusal to keep his end of the bargain, Mokuba arrived on the top of the skyscraper in the KaibaCorp helicopter, having escaped captivity with Téa's help. To repay Yugi's friends for saving Mokuba, Kaiba took Yugi to find his friends, having tracked the signal from Joey's Duel Disk. On the helicopter, Yami Yugi told Kaiba that he is a separate personality from Yugi.
They arrived at the Domino Pier and find Joey and Téa are possessed by Marik, with Joey prepared to duel Yugi. Seeing the Duel had been set-up to kill the loser, Kaiba tried to call it off, but Marik disregarded his authority. Once Tristan and Duke arrived at the Duel, Kaiba and Mokuba explained the situation to them. Towards the end of the Duel, Kaiba threw a card at one of the Rare Hunters monitoring the Duel. The card got lodged into his hand, causing him to drop the controls for a crane hovering a giant crate over Téa. With him temporarily unable to drop the crate, the KaibaCorp helicopter pulled it away from Téa. Once the Duel concluded with everyone alive, Kaiba parted and told Yugi that he'll see him at the finals.
Kaiba took his helicopter to the KaibaCorp Stadium, where he waited for the other finalists. After six of the other seven finalists arrived, the true location of the finals, the Kaiba Craft 3 landed. Kaiba's men tried to prevent Yugi and Joey's friends from boarding as they were not finalists, but Kaiba nonchalantly allowed it. On board Kaiba insulted Joey about making it this far by luck and advised Yugi to start using his Egyptian God Card.
Bakura was greatly injured after is Duel with Yugi. His friends tried talking Kaiba into making an emergency stop to take him to the hospital, but Kaiba refused and instead had the medical team on the blimp sent to look after Bakura.
Kaiba saw Joey's quarter-final Duel against Odion, who they believed to be Marik, as a chance to find out the abilities of his Egyptian God, "The Winged Dragon of Ra". During the Duel, both players were struck down by Ra's lightning. Kaiba declared that the first player to stand up will be the winner and if neither stand within five minutes they will both be disqualified. He learned that Marik was also a finalist under the disguise "Namu" and while Odion had a fake "The Winged Dragon of Ra", Marik held the real one. He refused to disqualify Marik as he won't be able to win his God Card in that case.
Mai's Duel against the real Marik was also used as a chance to learn more about "The Winged Dragon of Ra". When Mai tried Summoning Ra, which she managed to add to her own hand, hieratic text appeared on the card, which Mai needed to recite in order to Summon it. Kaiba had his satellites photograph the card, so he can have the text translated later, although Marik suggested that Kaiba is already able to read them.
Once Mokuba began the translation, he found that some of Ra's effects are also printed there.
In the last of the quarter-finals Kaiba found out the eight finalist is Ishizu Ishtar, as the two of them dueled. In the meantime, Kaiba had Mokuba work on translating Ra's text. Ishizu had already predicted Kaiba's moves for the Duel using her Millennium Necklace and foresaw her own victory. In the first few turns of the Duel, Kaiba had Ishizu send plenty of cards from her Deck to her Graveyard. Ishizu used "Exchange of the Spirit", causing both players to swap the contents of their Decks with their Graveyards, leaving Kaiba with very few cards. Almost finished the translation, Mokuba came out to support Seto in the Duel. Ishizu deliberately allowed Kaiba to Summon "Obelisk the Tormentor", so that she may win using "Blast Held by a Tribute", as predicted. However Kaiba was affected by the Millennium Rod and felt "Blue-Eyes White Dragon" calling out to him, feeling it wanted him to Summon it. Kaiba saw a vision of the sorcerer holding Kisara's body up to a "Blue-Eyes White Dragon" tablet. Kaiba followed the instinct, claiming he makes his own future and tributed "Obelisk the Tormentor" to play "Blue-Eyes White Dragon", which he used to attack and defeat Ishizu.
Kaiba checked on the progress in translating "The Winged Dragon of Ra's" text. Mokuba told him that they're having trouble with the last few words, but Kaiba looked at the text in astonishment, finding that he's able to read it himself. Remembering what Marik said about only chosen people being able to read the text, what Ishizu said about him being connected to an ancient sorcerer and the instinct that told him to play "Blue-Eyes White Dragon" in the last Duel, Kaiba wondered what was happening to him.
While traveling to the finals, the Battle City blimp went out of control and was guided into a mechanical fortress in the sea, by Noah. Kaiba, Mokuba, Yugi, Joey, Tristan, Téa, Serenity and Duke were greeted by a projection of the Big Five, who explained that they got trapped in the Virtual World, after they failed to trap Kaiba there, during the Legendary Heroes game. For that they hate Yugi and his friends for helping Kaiba. Having Kaiba as a common enemy, Noah uploaded their minds into his computer system. Using an altered form of Duel Monsters, they planned to face the gang in order to claim possession of their bodies, so that they may exist in the real world.
The group were then transported to a virtual jungle. Kaiba wasn't fooled into thinking the place was real and allowed himself to be struck by a dinosaur, whose claw simply passed through Kaiba, leaving him unharmed. A virtual copy of Kaiba appeared and duels a Total Defense Shogun in a demonstration of the Deck Master rules, used in this virtual world. The Big Five separated the gang, by making holes appear under them.
Seto and Mokuba ended up together in a forest. The two of them came to a door, which transported them to a virtual reconstruction of the orphanage, they used to live in. Here they were shown projections of their past, including when they got sent to the orphanage and when they got adopted. Mokuba ran away from Seto over to the door, telling Seto that he had liked things the way they were before they got adopted. At least back then, Mokuba said that Seto smiled once in a while. Seto reminded him that they can't change the past and assured him that it's just an illusion created by Noah. However Mokuba opened the door, causing him slip over the side of a cliff. Seto reached in on time, catching Mokuba's arm before he fell any further. Seto pulled him up and the two found themselves on top of the cliff. The virtual world Seto designed had safeguards to prevent such harm befalling on people, but this place, they realized, is different. Seto told Mokuba that no matter what they see, he must realize that the past is over. He said that he is not proud of every decision he has made, but they were all made in favor of getting the two of them a better life.
Seto and Mokuba made their way to a log cabin in a forest. Inside they witnessed projections of when they started living with Gozaburo, including Seto being forced to study and having his toys confiscated. The projection faded away and Noah appeared before Seto and Mokuba. Seto asked Noah why he's making them watch this stuff. Noah replied that it's to refresh Seto's memory of how he forced Gozaburo to a dead end and one day Seto shall be punished.
Shortly afterwards, Noah sent them to another recreation of Seto's past, where he argued with Gozaburo over the use the virtual software, that Seto invented. Present day Seto accused Noah of using the virtual software that Gozaburo stole from him.
Having lived in Seto's shadow, Noah needed to prove that he is more deserving of the position of president of KaibaCorp and cannot do that through cheating. Seto wondered why Noah is putting the two of them in competition. Seto suspected, but can't believe it's to do with Gozaburo, since he is dead. Kaiba started to wonder who Noah really is.
Kaiba and Mokuba traveled through a desert, where the saw the ruins of KaibaCorp's old military center.
The two finally made their way to a city. Here Nesbitt, inside Tristan's body, attacked them with a kendo stick. Kaiba tried throwing a card at Nesbitt, but he blocked. He then grabbed a pipe, which Nesbitt easily knocked out of his hand. The real Tristan, in the body of a robot monkey, jumped at the imposter, saving Kaiba. Yugi and his friends arrived and caught the action. Joey punched Nesbitt, smashing him through a warehouse door. However Nesbitt emerged on a motorbike and snatched Mokuba, before driving off. Kaiba grabbed another motorbike and took off after Nesbitt.
The chase led Kaiba to a bridge, where he was stopped by Lector. Lector had taken the form of Jinzo, but this was hidden by his trenchcoat. In order to get Mokuba back, Kaiba had to first defeat Lector in a Duel. Kaiba was given access to Duel Monster cards, bar the Egyptian Gods to build his Deck. Kaiba choose "Lord of Dragons" as his Deck Master. He was initially unable to see Lector's Deck Master, nor does he care, until one of his Trap Cards was destroyed, revealing Jinzo to be the Deck Master. During the Duel, Lector taunted Kaiba about using the Big Five and Mokuba in order to overthrow Gozaburo. Lector's Deck was weapon-themed and Kaiba had worked to remove such aspects from KaibaCorp. Refusing to lose his dream to a weapon of death, Kaiba Summoned "Blue-Eyes White Dragon", which took out Lector's "Satellite Cannon", before it could launch an attack, winning the Duel for Kaiba.
After the Duel, Noah formed a tunnel and told Kaiba that he must come this way to find Mokuba. Inside he found Noah, disguised as Mokuba, who transported Kaiba to a living room, containing the real Mokuba. Noah insisted that it was Kaiba's former employee that kidnapped Mokuba and that he was the one who rescued him. Kaiba tried to leave with Mokuba. However Mokuba had been brainwashed against him by Noah.
Yugi and Téa arrived and showed Kaiba a picture of Noah with Gozaburo. Noah showed Seto a clip from is own past. There Gozaburo was shown speaking with Noah, he handed him a picture of Seto, saying that he planned to bring Seto here to challenge Noah academically and prove Noah had the intelligence to run KaibaCorp. Noah agreed and called Gozaburo father. Kaiba refused to believe Noah was Gozaburo's son and asked how come they never met before.
Before Noah could answer, an alarm sounded causing him to leave. Kaiba, Téa and Yugi wound up with the rest of Yugi's friends, while Noah took the Big Five away to tell them off for trying to steal bodies having not won their Duels.
As Yugi's friends asked Kaiba about Noah and saving Mokuba, he told them to mind their own business and redirected their attention to The Big Five, who are now sharing Tristan's body.
While Yugi and his friends were distracted, Kaiba searched for Mokuba by himself. At the top of a hill, he started calling for Mokuba. Although Mokuba heard him, he refused to answer, accepting Noah as his only brother. The clouds in front of Kaiba disappeared, revealing a Kaiba Land. (In the English version that Kaiba Land had not been built, nor had Kaiba shown anyone its blueprints.)
Inside Kaiba Land, Seto was shown a video with footage of young Noah, spending time with Gozaburo and Noah's funeral, in which Gozaburo said that Noah can still be saved.
Kaiba took a train from Kaiba Land to a volcanic area, where he met Noah. Noah explained how he had his consciousness uploaded into the virtual world shortly after the accident, where he nearly died. By beating Seto in a Duel, Noah said that he will prove he is superior and return to the real world in Seto's body, where he will take over KaibaCorp. Seto laughs at the idea of Noah beating him and being able to run KaibaCorp. He accepted the challenge and selected "Kaiser Sea Horse" as his Deck Master.
Yugi and his friends arrived to watch the Duel. After a few turns, Seto got a chance to win, but Noah used Mokuba as human shield. Kaiba refused to attack Mokuba and ended his turn. Seto tried talking Mokuba into returning to his side. Yugi pointed out that he was in this situation before when Marik possessed Joey and urged Seto to keep fighting to awaken his bond with Mokuba. Kaiba managed to Summon "Blue-Eyes White Dragon". Mokuba recognized this as the the card he drew for Seto. Mokuba imagined Seto and himself on the back of a "Blue-Eyes White Dragon" and broke free from Noah's influence. With "Blue-Eyes" out, Seto played "Last Turn" creating one final battle to determine the winner of the Duel. Kaiba choose "Blue-Eyes White Dragon", with 3000 ATK as his monster and Noah chooses his Deck Master, "Shinato's Ark", but revealed its true form "Shinato, King of a Higher Plane", with 3300 ATK. "Shinato" defeated "Blue-Eyes White Dragon", causing Seto to lose the Duel.
Having defeated Seto, Noah turned Seto and Mokuba into stone. However Yugi accused Noah of foul play, by causing Seto to give up his chance for winning over his brother's safety. Yugi then challenged Noah to continue the Duel with him. Should Yugi win everyone Noah trapped would be freed. Yugi combined his Deck with Seto's and continued the Duel from where Seto had left off. When Yugi was on the brink of defeat, he imagined everyone Noah had turned to stone, including Seto, were with him. They each handed Yugi a card to draw with "Card of Sanctity". Using them Yugi defeated Noah, returning everyone who was turned to stone to the way they were before.
Gozaburo appeared in the sky before Noah and his prisoners, revealing that he had digitized his mind after losing KaibaCorp to Seto. Gozaburo revealed how he had used Seto to motivate Noah and previously planned to use his body to host Noah's mind. After Gozaburo uploaded his mind into the Virtual World, he planned to take Seto's body for himself. He no longer intended to do that as he has plans to digitize the entire world and rule it.
Noah led the prisoners, claiming to be taking them to an exit. Despite not trusting Noah, Kaiba went along. As he predicted, Noah betrayed them and split the gang up. Kaiba headed to the virtual KaibaCorp headquarters to confront Gozaburo.
Gozaburo imposed a game of Duel Monsters for Seto to play for his freedom. Seto accepted and found himself struggling against Gozaburo's "Exodia Necross". However he found its weakness and removed the "Exodia" pieces from Gozaburo's Graveyard, stripping it of its abilities. Seto defeated "Exodia Necross" with "Blue-Eyes White Dragon", winning the Duel.
Gozaburo was unwilling to give up and transformed into a monster and proceeded to attack Seto. Yugi appeared and managed to save Seto in time. Noah had set the virtual world servers to self-destruct, but having had a change of heart, he helped Seto and Yugi escape. He told them to jump off the KaibaCorp building and opened a gateway to the real world, which they passed through before hitting the ground. Before leaving Kaiba exclaimed, "I won't be buried with you, Gozaburo".
Yugi, Kaiba and Mokuba ran to escape the fortress before the missiles struck. Joey and Tristan helped them get onto the moving blimp, as they left Noah's fortress, before it got destroyed.
Battle City finals
Kaiba, Yugi, Joey and Marik partook in a Battle Royal to determine the matchups for the semi-finals. Each duelist selected a monster to exclude from their Deck to determine the order of play. Kaiba chose the "Masked Beast Des Gardius", which he had taken from Lumis. Since it had the highest ATK, Kaiba got to go first. Since "The Winged Dragon of Ra" is the strongest of the Egyptian Gods, Kaiba planned to win "Slifer" off Yugi so he could have two Egyptian Gods when facing Marik and "Ra". Wanting to face Yugi in the semi-finals and too proud to purposely lose, Kaiba made sure he and Yugi were the last two standing in the Battle Royal, matching them up for the second semi-final.
Before Joey's Duel with Marik, Kaiba commented that Joey didn't stand a chance against "The Winged Dragon of Ra". Joey protested that he went up against "Ra" before, but Kaiba reminded him how it knocked him unconscious. Kaiba told Yugi that his computer had managed to translate "Ra's" effects. However, Yugi was unconvinced and believed Kaiba's connection with the past played a part in translating the text. Kaiba planned to use Joey as a guinea pig, so he can study Marik's strategy. Had it been Yugi that was facing Marik, Marik would win "Slifer the Sky Dragon" making it harder for Kaiba to defeat him in the finals. Yugi smirked that Kaiba's plan had a flaw; he has to get past him first.
Towards the end of the Duel, Marik had Joey hit hard by one of "Ra's" effects. Mokuba protests that Marik has gone too far, but Kaiba refused to stop the Duel as he must see "Ra's" abilities with his own eyes. Kaiba was stunned to see Joey still standing after taking the blast. Joey prepared to attack Marik directly with his "Gearfried the Iron Knight" to win, but collapsed. Kaiba gave Joey 30 seconds to rise. Unable to do so, Joey was disqualified. Kaiba was impressed with Joey's performance, thinking to himself "The way you die, at last I'll recognize you as a duelist". (In the English version, Kaiba thought that Joey wasn't the third-rate amateur he thought he was.)
Kaiba faced Yugi in the second quarter-final. He created a holographic Colosseum of spectators around the top of the tower for the Duel.
Kaiba tried to Summon "Obelisk the Tormentor" at an early stage, but Yami Yugi manages to counter both his attempts. Kaiba stole "Slifer the Sky Dragon" from Yugi's Deck using "Lullaby of Obedience". However Yami took it back with "Exchange", which he had been planning to use on "Obelisk". Yami and Kaiba each managed to Summon their respective Egyptian Gods. The two constantly altered the Gods' ATK or blocked each others attacks, preventing the other from destroying their God. Kaiba attempted to win using "Obelisk's" effect, tributing two monsters to inflict 4000 damage to Yami, but Yami discarded "Kuriboh" to protect himself. Eventually the two Gods attacked each other and after a number of alterations each ended up with 4000 ATK and destroyed each other.
The battle of Gods caused Yami Yugi and Kaiba's consciousness to be transported to an ancient city. Here they saw "Obelisk" and "Slifer" turned to stone, while elsewhere, the Sorcerer Seto and Nameless Pharaoh battled. The Sorcerer told the Pharaoh that he's powerless in the face of the darkness and the land will soon meet the fate of its destruction. When questioned as to why he joined the forces of darkness, the sorcerer replied that he and his followers had allegiance to neither the Dark One nor the Pharaoh. The Sorcerer Summoned Blue-Eyes White Dragon from a tablet and the Pharaoh countered with Dark Magician. The two returned to present time. Kaiba asked if Yami had the same vision as he did. Yami claimed that their Duel is related to the one from 3000 years ago, and Kaiba said their Duel is destined. (In the English version, Kaiba calls the vision an illusion.)
Kaiba and Yami continued the Duel. They quickly Summoned "Blue-Eyes White Dragon" and "Dark Magician" respectively. Kaiba used "Lord of Dragons" and "The Flute of Summoning Dragon" to bring out his other two "Blue-Eyes White Dragons". Yugi used it to Summon Joey's "Red-Eyes Black Dragon" from his own hand. Yami blocked the attacks from two of the three dragons, destroying one of them and "Lord of Dragons" in the process. Kaiba used "Monster Reborn" and "Polymerization" to Summon "Blue-Eyes Ultimate Dragon", but Yami played "Double Spell" copying Kaiba's last two Magic Cards, allowing him to Summon "Dark Paladin". Yami told Kaiba that if he stands at the top filled with hatred, he won't find real victory. He'll only have to find new hatred, and his future will be filled with endless hatred. Kaiba attacked "Dark Paladin" with "Blue-Eyes Ultimate Dragon", but Yami used "De-Fusion", splitting the "Ultimate Dragon" into three "Blue-Eyes White Dragons". He used "Diffusion Wave-Motion", allowing "Dark Paladin" to attack all three of them, winning the Duel.
Kaiba thought Battle City was his tournament, the entire event was designed so that he would be victorious, he wanted to put the memory of his adoptive father behind him and be crowned the world's best duelist atop his Duel Tower. Despite coming so close, his victory slipped away from him and he said that he's nothing. Yugi compliments Kaiba on the Duel, but Kaiba said he doesn't want his pity. Yugi admitted Kaiba is a strong duelist, but he was defeated by the monster in his heart called "hatred". Yugi pointed out how friendship helped him win, but Kaiba said that everyone is alone in this world and he doesn't want any pals to slow him down. Yugi called that sad, to which he just scoffs. Kaiba accepted his defeat and angrily gave Yugi his "Obelisk the Tormentor" card, as per the rules of the tournament.
As Kaiba left, Joey, who had awoken from his coma, challenged Kaiba to a third place play-off. Kaiba wasn't interested at first and considered dueling Joey to be waste of time. But Joey persisted and Kaiba eventually accepted. At the bottom of the Duel Tower, the two faced off. Kaiba played "Crush Card" at an early stage, eliminating Joey's stronger monsters. Regardless Joey put up a good fight. He annoyed Kaiba by taking control of one of his "Blue-Eyes White Dragons". Towards the end of the Duel, Joey attempted to win by using "Time Wizard" to age "Baby Dragon" into "Thousand Dragon" and weaken Kaiba's "Blue-Eyes White Dragon". Kaiba scolded Joey for thinking the Duel is fun. (In the English version, he mocked Joey for relying on luck to win his Duels.) Kaiba used "Interdimensional Matter Transporter" to save his dragon from "Time Wizard" and won on his next turn. Kaiba left thinking the Duel was a waste of time.
Initially Kaiba had no intention of watching the final Duel between Yugi and Marik, but was confronted by Ishizu, who told him Yugi is going to need his help to defeat Marik. Kaiba walked away, not caring if Yugi loses. Ishizu called him back and said "pret kreto", an Ancient Egyptian phrase, which to Kaiba's own surprise, he understood. She said that these words were prayers for the dead, from a friend that were engraved on a stone found in the Pharaoh's temple. (In the English version, Ishizu didn't speak Ancient Egyptian and told Kaiba that his own future is at stake.) Ishizu told Kaiba of his connection to the sorcerer, who was the Pharaoh's rival, but ultimately helped the Pharaoh save his people and now history is repeating itself. Kaiba was unconvinced and left to prepare for the detonation of the the Duel Tower. However, Mokuba started to cry that Yugi and Joey were right about Kaiba being filled with hate, dueling for all the wrong reasons and never having fun anymore either.
Kaiba reconsidered and decided to help Yugi, despite hosting the tournament to beat him. Kaiba estimated Yugi's chances of winning to be 3%, but he has a card that can beat "The Winged Dragon of Ra". If Yugi could figure out how to use it, it would give him a 20% chance of winning. (Kaiba made no such calculations in the English version.) As he made his way to the Duel, Kaiba remembered Yugi saying that the strength of his friends brought him victory and wondered if Yugi can create a miracle if he entrusts him with this card. (In the English version, Kaiba thought he'd enjoy watching Yugi fall at the hands of Marik, but it would be interesting to see if Yugi has what it takes to use this card.) Before the Duel, Kaiba gave Yugi the card, "Fiend's Sanctuary". Kaiba told Ishizu that he only helped Yugi to prove her wrong when he loses.
With the tournament over, Kaiba and Mokuba, initiated the self-destruction of the Duel Tower to destroy their memory of Gozaburo and his loss to Yugi. While everyone else left in the helicopter, Kaiba and Mokuba leave in the Blue-Eyes White Dragon jet, as they planned to start work on Kaiba Land right away.
Waking the Dragons
When real Duel Monsters started appearing, KaibaCorp got plenty of phone calls from people, who believed they were created by Kaiba's Solid Vision. Kaiba, who was still in America working on Kaiba Land, made an announcement on TV. He said that they had shut down their system as a test and found the monsters still appeared, so something other than their system is causing the monsters to be created.
In his office, Kaiba said that someone is trying to make a fool out of him and wondered if the monster appearances were the doing of one of his rivals. He suspected Industrial Illusions and got Roland to contact them. Mokuba rushed into the office and showed Kaiba that someone was buying their shares and owned nearly half the company. If the person was to buy any more shares, they could take control of the company, but Kaiba refuses to allow that. Alister, pretending to be Pegasus made contact with Kaiba, claiming to be the one who bought the stocks, but he's not interested in Kaiba's company and just wanted the upper hand so he could force Kaiba to do something for him.
Kaiba and Mokuba took the Blue-Eyes White Dragon jet to Duelist Kingdom. They confronted Alister disguised as Pegasus in the castle. Kaiba accused him of being responsible for the monster appearances. Alister claimed that it's all Kaiba's responsibility. Kaiba demanded to know what he meant, and Alister said that he will tell him if Kaiba can beat him in a Duel. Alister used the Dueling Arena, while Kaiba choose to put his cards on his Duel Disk, as he did not trust Pegasus.
Alister used Pegasus' Toon strategy. Kaiba stopped this by destroying "Toon World" and accused Pegasus of using the same old strategy. After noting that Pegasus isn't predictable, he doubted he was facing the real Pegasus, so Alister revealed the disguise. Alister then played "The Seal of Orichalcos", so that the loser would lose their soul. Alister accuses Kaiba of ruining his life, since his brother had been killed (went missing in the English version) in a war, where Gozaburo sold weapons to both sides. Since Alister had been studying Kaiba, he was able to predict that Kaiba would reply on "Crush Card", and prevented this with "Royal Decree". He took control of two of Kaiba's "Blue-Eyes White Dragons" to stage the perfect revenge. Kaiba realized that there wasn't a card in his Deck that could save him, but before drawing his next card, his consciousness was transported to a hall, where he sees two dragons trapped crystal. He removes a sword from one of the dragons, freeing it. To Kaiba's surprise, he somehow knows the dragon's name is Critias. (In the English version, Dark Magician Girl told him that he had been chosen to release Critius and instructed him to remove the sword.) Kaiba returned to reality and drew his next card, "The Fang of Critias", which was not in his Deck before. He combined it with "Crush Card", forming "Doom Virus Dragon". He used "Doom Virus Dragon" to destroy Alister's monsters and attack him, but Alister played "Contagion of Madness", making the Duel a Draw. Since it was a Draw, neither player lost their soul.
Afterwards Kaiba wondered about the card, "The Fang of Critias". After boarding his jet, he received an e-mail from HQ, saying that he needed to come back, but Kaiba opted to visit Industrial Illusions to ask about the card instead. Mokuba was unable to contact Pegasus on the way. Kaiba suspected that this would happen; whoever Alister is working for has already captures Pegasus and wants him next. Kaiba wondered how he could know the effect of the card; he doesn't believe in the supernatural, but the power of the card is very real. While on the jet, Kaiba noticed "The Fang of Critias" glowing while elsewhere Joey Wheeler acquired "The Claw of Hermos".
Kaiba arrived at Industrial Illusions American headquarters, where he encountered Yugi, Joey, Téa, Tristan and Duke. He asked about Pegasus and learnt that Mai Valentine has been there earlier and taken his soul using "The Seal of Orichalcos". Kaiba briefed the others in on his encounter with the imposter Pegasus, who he believes is trying to take over his company. In search of answers, the group followed by Rex and Weevil go to a private room, which Yugi is able to open using a card Pegasus gave him. A hologram of Pegasus informed the party about Doma's involvement in historical events. Kaiba recalled Gozaburo saying something about a dark force behind the world economy, which he now believes could be Doma. (In the English version, Kaiba says that this is just a hoax by Pegasus.) Kaiba learned that Yugi and Joey also have Legendary Dragon cards like "Critias" and Yami claimed it was their destiny to work together to defeat Doma. However Kaiba left them, claiming that he's the one who decides his fate.
After Kaiba returned to KaibaCorp headquarters, he received word of their stock plummeting and nearly half of the company being bought out by an unknown investor. Kaiba believed that it was Doma's doing and had his employees research what they could find about Doma. Mokuba was concerned about Kaiba facing Alister, again as he believed that Alister was simply fighting for his brother. However, Kaiba insisted that he must knock Doma down or there won't be any hope for KaibaCorp or Kaiba Land. (In the English version, Kaiba believed that Pegasus was behind the problems and Mokuba suggested that it could be Alister.)
Kaiba received a phone call from Joey, who asked him for a lift to Florida in exchange for information about Doma, but Joey got overexcited and told him that one of them defeated Yugi in a Duel and took his soul. Kaiba became outraged over Yugi throwing away his championship title to some "nobody" and not him. He called Yami a disgrace to the game and hung up the phone, thinking that this is just another excuse to hunt down those thugs.
On board a company plane, as Kaiba and Mokuba notice a bizarre light phenomenon outside the window, the pilot, who is Alister in disguise reports that there will be some turbulence. The brothers get curious as to what is going on and find that the rest of the plane is empty. They finally found Alister, who demands a rematch and informs them that the other passengers had been evacuated before the flight, as he didn't want them to interfere with their Duel. (In the English version, he said that the other passengers had been an illusion.) Kaiba flipped a switch, which removed the furniture and cleared a space for dueling. Alister vowed to hang Kaiba's soul on Mikey's tombstone and the Duel began.
Once Alister played "The Seal of Orichalcos", its green light damaged the plane and switched off the autopilot. The sides of the plane appeared as if they disappeared and the seal rose Kaiba and Alister to the roof of the plane and formed a dome over itself.
During the Duel, Kaiba is sent to an illusion of a city that was made a battlefield by KaibaCorp, when Gozaburo was in power. Kaiba appeared in a hideout, where he met Aaron, who looks like Mokuba. Aaron, along with Tony and Dennis had collected weapons from the battlefield to give to people protecting the city. (The references to the weapons were removed in the English version.)
Outside, Aaron offered to play chess with Kaiba by etching the board in the soil and using empty weapon cartridges as pieces. This reminded Kaiba of how he used to play chess with Mokuba in the orphanage. (The game of chess was removed in the English version.) Kaiba and Aaron were interrupted when the hideout was bombed. Aaron tried to run over there to save Tony and Dennis, but Kaiba stopped him, insisting that it was too dangerous. A tank then appeared and shot at Kaiba and Aaron. The tank turned out to be one of Alister's cards and the Duel resumed in the city, while Aaron had disappeared. Alister explained what Kaiba had seen had really happened before; Aaron, Dennis and Tony were his friends growing up, that attack from the tank had killed Aaron and Alister's brother Mikey had been killed in the same way. (The mentions of death are removed in the English version.) The vision of the city faded shortly afterwards and the Duel continued on the airplane. Alister accused Kaiba of being like Gozaburo and expressed his wishes for a world free of war, which isn't possible with people like Gozaburo. To achieve such a world, he claimed to need Kaiba's soul.
After sending an SOS to Roland, Mokuba appeared to watch and begged Kaiba to stop the Duel or Alister would lose his soul. Kaiba claimed that he needed to defeat Alister for the sake of Kaiba Land. (In the English version, he said that he doesn't back down from a challenge.) Roland appeared with a team of helicopters to rescue the Kaiba brothers later in the Duel. However Alister used the "Seal of Orichalcos" to damage the plane further and send it plummeting. Kaiba used "The Fang of Critias" to form "Tyrant Burst Dragon", whose effect powered up his "Blue-Eyes White Dragon" (In the English version, the combination was called "Blue-Eyes Tyrant Dragon"), and defeated Alister before the plane crashed. The three Legendary Dragons, Timaeus, Critias and Hermos then appeared and carried the plane to a safe landing.
Outside the plane, Kaiba and Mokuba met Joey, Téa, Tristan and Yami, who had followed the dragons. Roland landed his helicopter and informed them of KaibaCorp being bought out by Doma. Yami tried to convince Kaiba that they were brought together for a reason. Despite not believing in destiny, Kaiba said they might be useful and gave them a lift in one of the helicopters. Despite no longer working for Kaiba, Roland and Fubeta vowed to help him. Kaiba receives images of the ruins from the men he sent to the museum, who are attacked by ninjas immediately afterwards. Kaiba sent the data from the ruins to Rebecca's laptop. However the ruins were too worn for her and Arthur to decipher them. Kaiba ordered the pilot to take them to the United States KaibaCorp headquarters. Despite it being taken over by Doma, it had the necessary technology to clear-up the images.
The group met up with Duke, Arthur and Rebecca at the pier near the KaibaCorp building. Kaiba and Yami took an underground passage into the building. Once they got inside they were attacked, by Duel Monster Spirits. By playing cards on their Duel Disks, Yami and Kaiba were able to Summon monsters to fight them off. The monsters are eventually destroyed and the two are cornered. However Rebecca, who hacked into the security system manages to open and close doors to Kaiba and Yami's advantage safely guiding them to the central computer mainframe. Using the computer, Kaiba cleaned-up the images and sent them to Arthur, who translated them as a prophecy about a black serpent returning and Atlantis ruling again. Kaiba recognized an insignia on the ruins as that of Paradius.
The president of Paradius, Dartz, destroys the computers and appears before Kaiba and Yami standing on The Great Leviathan. Kaiba figured that Dartz is also in charge of Doma. Yami and Kaiba attempt to Duel him and Summon "The Eye of Timaeus" and "The Fang of Critias". However Dartz disappeared before they could attack him. The Duel Spirits then broke into the room, causing Kaiba and Yami to flee to the roof, where they boarded the Blue-Eyes White Dragon jet and crash landed.
Kaiba and Yami met up with the others and got the location of Paradius headquarters from Rebecca. However they were ambushed by Orichalcos Soldiers, who Yami and Kaiba managed to fight off by Summoning "Timaeus" and "Critias". Kaiba then left the group to find defeat Dartz himself and reminded them that they can use his satellite system to track Joey's location.
Kaiba and Mokuba stopped at a car shop and hopped into a sportscar. The salesman tried to stop them, but Kaiba handed him a check for $500,000 and sped off. They were stopped by a group of Orichalcos Soldiers one block from the headquarters. Kaiba fought them off using "Blue-Eyes White Dragon" and "The Fang of Critias" and continued to drive to the headquarters, but was stopped once again when he bumped into Téa and Tristan with Joey's now soulless body. They were forced to abandon the car as they got onto a fire escape to get away from a swarm of rats with glowing red eyes. The five of them then made their way to the Paradius headquarters, where they found Yami dueling Raphael.
After the Duel, the building started to collapse. Fortunately for the group, Roland arrived in the helicopter to rescue them. They witnessed the outside of the building crumble away, revealing an Atlantian building inside it. Yami handed Kaiba a chip, he received from Raphael, which Kaiba inserted into a device and found it contained a map to Dartz's lair. They prepared to fly towards it, but military helicopters appeared and gestured them to follow. They were guided through a swarm of locusts and onto the USS Courage. (The locusts were removed in the English version.)
The military asked for their help in defeating Doma. Doma had been controlling the country's politics preventing them from initiating an attack. (In the English version, Dartz had not been leaving enough evidence to allow them to attack.) The military then flew them to Dartz's temple.
Inside the temple, they found the souls of everyone taken by "The Seal of Orichalcos" sealed in slabs lining the walls. Dartz appeared before them and explained that he has spent ten millennia collecting the souls to revive The Great Leviathan. For the souls to be freed, Dartz said that the Nameless Pharaoh must defeat him first. Not wanting to face Dartz alone, Yami enlisted Kaiba for help and the two of them faced Dartz together.
During the Duel, the Orichalcos generated another vision of the past. This time they witnessed Atlantis ten millennia previous, as it became corrupted by the Orichalcos, resulting in the Battle of Atlantis, which caused the city to sink.
The two managed to work together as a team, but when Dartz's "Mirror Knight Tokens" bore the faces of Yugi, Joey, Mai and Pegasus, all of whom had been taken by "The Seal of Orichalcos", Kaiba was unable to talk Yami into attacking them. Kaiba learned that Dartz had been disguised as Gozaburo in order to manipulate Alister into hating the Kaiba family. Kaiba finally lost, but transferred the ATK of his "Mirror Force Dragon" to Yami's Life Points using "Wish of Final Effort", before losing his soul. Yami made use of the extra Life Points to win the Duel.
After he lost, Kaiba's soul was inside a bubble being sucked into The Great Leviathan, along with some of the other lost souls. Once Yami defeated Dartz, the Legendary Knights freed the chosen duelists; Yugi, Joey and Kaiba, from the Leviathan.
Outside, the group found that Atlantis has risen out of the sea. Kaiba, Yugi and Joey returned into temple to find Dartz. Yugi handed Kaiba and Joey back their Legendary Dragon cards and the trio entered a vortex transporting them to the heart of Atlantis. They found that Dartz had left his body and combined with The Great Leviathan, to compensate for not getting the souls of the chosen duelists.
Kaiba, Yami and Joey Summoned a barrage of monsters to battle the leviathan and are accompanied by an army Dark Magician Girl brought from the Spirit World. However the Leviathan shot tendrils at the three duelists and pulled them inside it. By absorbing the strength of the other souls within the leviathan, Yami managed to Summon the Egyptian Gods and free himself, Kaiba and Joey. Kaiba witnessed the Gods attacking the Leviathan, freeing the souls it had taken.
As Yami battled what was left of The Great Leviathan, Kaiba and Joey were forced to leave Atlantis as a tidal wave approached. They met up with the others and took off in the KaibaCorp helicopter. After The Great Leviathan was defeated and Atlantis sunk once more, Kaiba's "The Fang of Critias" card disappeared.
Kaiba managed to reclaim the stock he lost to Doma, but KaibaCorp still lost a lot of reputation and the price of its stock went down. Mokuba suggested that they host a tournament at the grand opening of the USA Kaiba Land. Kaiba agreed and decided to call it the KaibaCorp Grand Championship. He sent invites to some of the greatest duelists in the world, but, because of his busy schedule, he was not able to take part himself. He arranged it as a sixteen player knockout with the winner facing Yugi.
At the opening of the Kaiba Land Zigfried von Schroeder hacked into the Kaiba Dome's computer system. By the time Kaiba arrived at the Dome, Yugi had defeated the CPU in a game of Duel Monsters, restoring control to normal. Unsure who did it, Kaiba tightened security and vowed to punish the hacker.
At the beginning of the tournament Kaiba jetpacked into the Kaiba Dome to introduce the tournament as the ultimate test of survival with Kaiba Land as its battlefield.
With the tournament running too smoothly, Kaiba suspected the hacker must be already be in Kaiba Land and got Roland to perform a background check on all the competitors in the tournament. Kaiba grew suspicious of Zigfried, who had entered the tournament under the name "Zigfried Lloyd", when he saw him announce to a surveillance camera that he has a special show in store for Kaiba, before dueling Rex and Weevil, who snuck in.
Kaiba prepared for an attack on the computer system, such that he would be able to completely back-up the system should it get damaged.
During Joey's Duel with Zigfried, Zigfried thought Kaiba was too slow with figuring him out and gave Kaiba a clue by triggering a virus causing electronics around the park to go haywire. Kaiba then remembered his encounter with Zigfried at the party thrown by Gozaburo. Kaiba managed to stop the virus and ordered Roland to perform another background check on Zigfried Lloyd and find out if he's connected to the Schroeder family.
They found no personal or family information about Zigfried Lloyd, but plenty of tournament history and that he had entered these tournaments through the recommendation of politicians who were not available to comment. However Kaiba picked Bayern Governer Fravz from the list of politicians and insisted that they ask him again and mention that Kaiba still remembers "what happened". (In the English version, Kaiba told them to make him an offer he can't refuse.) After finishing the background check, Kaiba's suspicions were confirmed as he found Zigfried's true identity.
Before the final Duel between Zigfried and Leon von Schroeder, who had entered under the fake name "Leon Wilson", Kaiba interrupted and exposed Zigfried as Zigfried von Schroeder from Schroeder Corp. He accused Zigfried of causing the machines to go haywire, and disqualified him for entering under a fake name. Zigfried accused Kaiba of being a coward, afraid that someone from Schroeder Corp might win the tournament and become the world champion. Kaiba disagreed, commenting that he was kicking Zigfried out because he didn't like him, not because he was scared of him. Kaiba then broke his promise of not dueling in the tournament in favor of embarrassing Zigfried on TV and challenged him to a Duel.
As they dueled, Zigfried stated how KaibaCorp had always been one step ahead of Schroeder Corp in the gaming industry, including Kaiba making the contract with Pegasus to develop holographic technology for Duel Monsters, just before he could make a similar contract. (In the English version, he accused Kaiba of stealing his invention.) With KaibaCorp's stock low, Zigfried planned to defeat Kaiba and destroy KaibaCorp's reputation and cause Pegasus to give up on KaibaCorp and make a new partnership with Schroeder Corp. However Kaiba went on to win the Duel. Believing that Zigfried is no longer a threat, Kaiba didn't bother having him removed.
As Leon faced Yugi in the title Duel, Kaiba noticed Leon was acting strange. One of his employees performed another background check on Leon Wilson and found that he is part of the Schroeder family. Zigfried appeared on Kaiba's balcony and revealed that Leon winning the tournament had been his plan all along. Kaiba was unable to disqualify Leon as the tournament rules forbade him from interrupting Duels.
Leon played the card "Golden Castle of Stromberg", which should be Illegal, but Zigfried had hacked the system to allow it. Unbeknownst to Leon, Zigfried had also re-written the data on the card, so that it would inflict a deadly virus into KaibaCorp's computer system when played. Kaiba tried to launch an anti-virus, but was too late. As Kaiba and his workers tried to stop the virus, Yugi managed to destroy "Golden Castle of Stromberg", stopping the virus from doing further damage.
Despite Leon losing the Duel, Zigfried believed the virus had done enough damage to destroy years worth of programming, but due to his earlier preparations, Kaiba was able to restore everything.
Dawn of the Duel
Yami Bakura appeared on Kaiba's computer screen to show him that he had kidnapped Mokuba and challenged Kaiba to a Shadow Game of Duel Monsters on the roof of the KaibaCorp building. To Kaiba's surprise purple mist surrounded them as they dueled, but Bakura told Kaiba not to be so shocked as he used to play this game 3000 years ago. (In the English version, he said that Kaiba's attitude hadn't changed in 5000 years.) When Kaiba Summoned "Blue-Eyes White Dragon", Bakura showed him a vision of Priest Seto holding Kisara up to the "Blue-Eyes White Dragon" tablet. Bakura left before they could conclude the Duel and chucked Kaiba the Millennium Eye, telling him to bring it to Egypt if he wants to understand the nature of his bond with Blue-Eyes White Dragon.
Roland later informed Kaiba that Yugi and his friends had boarded a flight to Egypt. Wondering why they did that, Kaiba looked at the Millennium Eye and thought Bakura must have gotten to them. Kaiba initially had no interest, but after Diabound used "Blue-Eyes'" "White Lightning" attack in the Memory World, Kaiba looked at Eye again, swearing he just heard "Blue-Eyes White Dragon". As Kaiba thought about what was going on the Eye started to glow and he saw another vision of Priest Seto standing on a balcony with the Pharaoh. Somewhat convinced, Kaiba took his Blue-Eyes White Dragon jet and flew to Cairo.
At Egypt, Kaiba landed near a museum, where he was greeted by the Marik, Ishizu and Odion Ishtar, who mistakenly thought he was here to see the pharaoh's tablet and told him that it had been moved to its original resting place. However Kaiba told them about Bakura and showed them the Millennium Eye. Fearing Bakura was up to no good, they advised Kaiba to go to the tablet to find out the truth.
Kaiba arrived at the cavern where the tablet was. He found Bakura, Yugi, Joey, Téa and Tristan's bodies lying unconscious on the floor. The Millennium Eye then lit up and sent a beam at the tablet and showed him visions of Priest Seto and other Ancient Egyptians. At the Shadow RPG table, Yami Bakura sucked Kaiba through a vortex into the Ancient Egyptian Memory World in order to absorb some of his soul to revive Thief Bakura.
Kaiba woke up in an alley afterwards and found that other people were unable to see him and could pass through him as if he wasn't there. However he met Kisara, who was able to see him and mistook him for Priest Seto. After realizing that he wasn't, she informed that an evil force was threatening their land and they must act quickly or everything would be lost. She bade him farewell and ran off.
Kaiba followed Kisara and watched her warn Priest Seto of the danger. The two of them were then attacked by the Shadow Magus. Kaiba saw a battle between Kisara, Seto and later Pharaoh Atem against the Shadow Magus, which resulted in the deaths of Kisara and the Magus, as well as "Blue-Eyes White Dragon's" spirit being sealed in a tablet. Afterwards the Pharaoh, who Kaiba recognized as Yami Yugi spoke to him. He told him who Priest Seto is and that they are playing a Dark Game formed by the memories of 3000 years ago. He advised Kaiba to try and get out because Zorc was about to be revived. The two of them watched Seto cover Kisara's body. (In the English version, Atem asked if Kaiba believed him now. Kaiba said that for all he knows it could be a bad dream. Atem looked at Seto and asked Kaiba to tell him that. However Kaiba asked if he's supposed to feel bad because some guy who looks like him lost his girlfriend.) After Atem and Seto left, Kaiba took another look at Kisara's body before leaving.
Kaiba saw the Egyptian Gods battling Zorc and to his surprise saw the Gods defeated. He saw Seto Summon "Blue-Eyes White Dragon" to battle Zorc, but to his horror it also got destroyed. Kaiba went after Zorc as he attacked a city. He saw two boys running from Zorc and yelled at Zorc to stop. In response, Zorc blasted fire at him. Kaiba managed to dodge it, but was unable to get the boys to move before they were incinerated. (The fire and the boys being killed were removed from the English version.) A Duel Disk appeared on Kaiba's hand, which he used to Summon a "Blue-Eyes White Dragon". Zorc reminded him that Seto had already tried that. However, Kaiba fused it with his other two "Blue-Eyes White Dragons" to form "Blue-Eyes Ultimate Dragon". As he did this, the souls of Kisara and Seto were drawn into the dragon. "Blue-Eyes Ultimate Dragon" and Zorc battled for a while. The ultimate collision of light and shadow created a bridge between worlds and the real world became visible in the sky.
Elsewhere Atem saw the "Ultimate Dragon" and thought Kaiba is the only person he's known to ever be able to Summon that monster. Using the power of the Millennium Puzzle, Millennium Scale and his DiaDhank, Atem gained the armor of "Black Luster Soldier" and fused himself and Kaiba with the Dragon creating "Master of Dragon Soldier". They attack Zorc, causing a massive burst of energy. The attack was strong, but didn't destroy Zorc. "Master of Dragon Soldier" disappeared and Atem and Kaiba returned to normal.
As Yugi and his friends tried to make the Pharaoh's hieroglyphic name appear on the cartouche, Zorc launched an attack at them, but Kaiba blocked it using "Ring of Defense". Zorc then threw another fireball at the ring, destroying it and throwing Kaiba back. Atem finally learned his name from reading the cartouche. With knowledge of it, he was able to revive the Egyptian Gods and fuse them into The Creator God of Light, Horakhty, who destroyed Zorc.
After the battle, Kaiba, Atem, Yugi, Téa and Tristan flew into the gateway in the sky to return to their world.
The group woke up back in the cavern with the tablets. Kaiba threw the Millennium Eye to Atem, who was back residing in Yugi's body. Joey began to question Kaiba on how he got it, but stopped at the sight of Bakura appearing. But they quickly found out it was the "good" Bakura. As the others helped Bakura out, Kaiba stayed back with Atem and took a final look at the tablets.
Outside the cavern, the group met the Ishtars, who were ready to take Atem to the Shrine of the Millennium Stone where he can finally be laid to rest. The group drove to a dock, where Kaiba was reunited with Mokuba.
On board the ship, Joey asked Kaiba why he was coming. Although he didn't answer, Ishizhu said that since his fate was influenced by the gods, Kaiba should witness this event with his own eyes. (In the English version, she said that although Kaiba won't admit it, he is here to witness the Pharaoh's final rite of passage.) After learning that Atem must lose a Duel as his final test, Joey and Kaiba both wanted to face him. However Yugi said that he will be the one to face Atem. Angrily Kaiba said that Yugi can't beat Atem. (In the English version, Kaiba said he didn't come this far to see Yugi lose his title to his imaginary friend.) Still unhappy, but accepting it, Kaiba told Yugi to at least build a real Deck if he's going to be dueling and offered him a briefcase of cards to use to construct a Deck. Yugi declined in favor of using his and Atem's cards.
The next day the group were led to the Shrine of the Millennium Stone. Kaiba watched from the sidelines and witnessed the Pharaoh separate from Yugi's body. He commented that they were about to find out who the true King of Games is. As Kaiba predicted, Atem used the Egyptian God cards, but to Kaiba's surprise he managed to get all three on the field at once.
Thinking it was obvious who would win, Kaiba prepared to leave. Joey, Téa and Tristan tried talking him out of it, but to no avail. Kaiba thought that if the Pharaoh wins, at least he can have a rematch with him. Yugi then called Kaiba to stay, saying that he owes it to the Pharaoh. (In the English version, he said that he thought Kaiba would like to see him beaten, but Kaiba replied that that was only if he was the one who got to beat him.) Yugi insisted that the Pharaoh and Kaiba have a history and Kaiba should be here to say goodbye when he loses. Kaiba was surprised to hear that Yugi still thought he could win. Since Yugi was so determined, Kaiba said that he would stay until the end. (In the English version, Kaiba said that once Yugi loses, he will show the pharaoh a real Duel.)
Kaiba was unable to find any weakness in the God Cards and thought will have to show him a Duel beyond his imagination to beat them. (In the English version, Kaiba thought that all this time the Pharaoh had been dueling for Yugi, while Yugi took the credit.) To Kaiba's astonishment, Yugi managed to destroy the three God Cards by repeatedly redirecting the "Lightning Blast" effect of "Slifer the Sky Dragon" back at them in the one turn. Having never seen anything like it before Kaiba said that he now believes Yugi. (In the English version, he said that Yugi is the true King of Games.) Joey was surprised to see Kaiba cheering for Yugi. Kaiba was once again surprised when the Pharaoh said that he knew Yugi would defeat the Gods and that was only the first stage of the Duel. When Yugi was forced to battle the "Dark Magician", Kaiba was glad that he stuck around.
After Yugi won, Kaiba watched Atem pass on into the afterlife. Once he was gone the cavern started to collapse and everyone ran outside. Kaiba and Mokuba left Egypt afterwards in the Blue-Eyes White Dragon jet.
Kaiba organized a card illustration project, where the winning entries would be put in a time capsule and sent into space. The cards would be produced once they received the wave aura from space.
Kaiba made a bet on his ownership of the school with Slade and Jagger Princeton. He was bold and had full confidence that the duelist representing Duel Academy, Chazz Princeton, would win despite the unfair advantage in the Duel. Kaiba stated at the end that anyone who was a student at his academy should be able to win a duel no matter what the situations are. (In the English version, he stated that Slade and Jagger needed to learn a little bit more about world domination).
While Lyman Banner was giving a history lesson, he mentions Yugi and Kaiba as the best duelists of their generation and shows drawings of them to the class. One of the girls in the class says that they are one of the best looking, and another girl calls them dream boats.
Kaiba allowed Sartorius the use of Kaiba Land during a Duel Academy field trip. He then ordered his security men to keep an eye on Sartorius having suspicion on his scheme for using Kaiba Land. (In the English version, Sartorius said that Kaiba hadn't aged in years.)
When Crow is investigating the disappearance of Robert Pearson in the dub, he goes to the security that Bolten owns. One of the security men jokes that they are going to have lunch with Seto Kaiba later on that day after they heard Crow say that he needed to see Bolten.
Yu-Gi-Oh! Bonds Beyond Time
Seto Kaiba is seen in the beginning of the movie dueling Yugi when he summons Exodia.
Kaiba's best known cards are his three "Blue-Eyes White Dragons" and the Fusion Monster formed from the three dragons, the "Blue-Eyes Ultimate Dragon". In addition to them he has made consistent use of Virus Cards and other strong monsters such as the "XYZ" series. During the Battle City arc, Kaiba's Deck was focused on Summoning "Obelisk the Tormentor", using his "Blue-Eyes" cards as a strong backup.
Kaiba appears to favor the Beatdown type of strategy, meaning he favors using cards and monsters that completely overpower his opponents. His cards are intended to be mean and vicious to reflect Kaiba's personality.