Ghost

For other uses, see: Ghost (disambiguation).

Ghost (known as The Ghost in the English version) is a type of Duelbot in Yu-Gi-Oh! 5D's.

History
After it was discovered that Ghost was responsible for the reported Duel Runner crashes and the major injuries incurred by several defeated duelists, as the damage caused by each duel was real, Trudge investigates and asks for Yusei's cooperation. He faces against Trudge in a Turbo Duel, in which he Summons "Machine Emperor Wisel Infinity" to defeat him.

During the duel, Ghost tells Yusei that Machine Emperor Wisel Infinity exists to remove the unnecessary things in the world. Ghost, referring to Synchro Monsters (which he believes are not needed in the world), states that this monster is the "proof of human´s evolution."

After he is defeated in an intense Duel by Yusei, Ghost ends up exiting the duel lane and crashing down into some trees. Before Yusei, Jack and Crow arrive, Placido appears to take back his Deck along with a fragment of the Duel Runner. Yusei, Jack and Crow rush down afterwards and discover that Ghost is a robot.

Trudge then later reveals that this special robot was being used by Sector Security in order to assist them with crimes involving Duel Runners. Also this robot had been the prototype that went missing a few days ago. There was no information on the Turbo Duel chip regarding all of the current events, as all the data was programmed to be erased once the robot lost the Duel.

Diablo
After Team Catastrophe is defeated by Team 5D's, Placido lets loose an army of Riding Roids. He refers to this army as "Diablo," and they are equipped with a highly efficient engine program that was stolen from Yusei and Bruno in episode 80. The Diablo charge into the WRGP, where they force duelists into a duel in Battle Royal mode. Together, the Diablo easily outnumber their opponents and defeats some of them with ease. Yusei, Jack, and Kazama manage to defeat the Diablo that they were facing; however Sherry and Mizoguchi eventually lost to the army of Diablo.

After Bruno transforms into his Dark Glass persona, Placido challenges him to a duel, during which Placido cheats by sending in a couple of Diablos to stop him from gaining the advantage in the duel.

The Diablo use an Ally of Justice deck, which focuses on using Ally Salvo to destroy the opponents cards and swarming the field with Ally of Justice Cosmic Gateway. They also use the Trap Card DNA Transplant, which allows them to use their monster effects on any monster, not just LIGHT Attribute monsters.

Deck
The deck the original Ghost uses, owned by Placido and used by Ghost for testing purposes, is an Anti-Synchro deck based around Machine Emperor Wisel Infinity and its various support cards. He uses a multitude of Trap cards to easily Special Summon the parts of Wisel Infinity and maintain control of the field.