"Kuriboh" (クリボー Kuribō) is an archetype of monsters used throughout the Yu-Gi-Oh! franchise. Yusei Fudo and Yuya Sakaki are the only anime protagonists who don't have a card from this archetype in their Decks (although their manga counterparts have used "Junkuriboh" and "Performapal Kuriborder" respectively). The archetype also contains a sub-archetype: "Winged Kuriboh".
In the anime, "Kuriboh" monsters are notable for being the Spirit partners of the main characters. A few episodes point out that "Kuriboh" monsters have special connections to the main characters who own various versions of this card.
In Yu-Gi-Oh!, Yugi Muto started with "Kuriboh", which he could discard to reduce battle damage that he would take from his opponent to 0 as well as use "Multiply" to protect him from battle. He uses "Clear Kuriboh" in Yu-Gi-Oh! The Dark Side of Dimensions. He can discard it to negate a damage-dealing monster effect or banish it from the Graveyard to potentially prevent a direct attack.
In Yu-Gi-Oh! GX, Jaden Yuki's Deck includes a "Winged Kuriboh" that he received from Yugi. His Kuriboh strategy focuses on Summoning "Winged Kuriboh LV10" with "Transcendent Wings" and Tributing it to wipe out the opponent's Attack Position monsters and inflict damage. His manga counterpart also has "Winged Kuriboh LV9", which restricts the use of Spell Cards. When his "Winged Kuriboh" is destroyed, all battle damage he takes that turn becomes 0.
In Yu-Gi-Oh! ZEXAL, Yuma Tsukumo obtains "Rainbow Kuriboh" during his time in Astral World, which was his father's card, and quickly forms a bond with it. Yuma would use its first effect to prevent his opponent from attacking him and would later activate its second effect of special summoning itself to protect himself from direct attacks.
While no "Kuriboh" monsters make an appearance in the Yu-Gi-Oh! ARC-V anime, the manga has Yuya using "Performapal Kuriborder", which prevents a direct attack, negates battle damage, and recovers LP equal to the negated damage.
In Yu-Gi-Oh! VRAINS, even though he does not use it in his Main Deck, Yusaku Fujiki used three copies of "Sphere Kuriboh" as shields during his infiltration of SOL Technologies' data bank. Linkuriboh would later cameo in a explanation on Link Monsters. Yusaku would later meet and obtain the "Linkuriboh" card after reuniting with Ai when the latter returned from the Cyberse World. Yusaku usually prevents by using Linkuriboh’s effect lowering his attacking monster's ATK to 0, thus making the attack useless and preventing Bohman’s attempts at victory.
"Kuriboh" monsters are generally defensive in nature, and on their own, they tend to prevent battle damage from occurring to the user. However, some of their support cards allow them to rapidly turn the tables upon the opponent, such as the powerful "Winged Kuriboh LV10" and "Detonate". Most "Kuriboh" monsters have 200 DEF, so "Flamvell Poun" would be perfect for searching your Deck for them. So far, all non-monster support cards for the "Kuriboh" monsters are Quick-Play Spell Cards, allowing them to function quickly in a themed Deck.
|Ankuriboh||Discard this card to Special Summon 1 monster from either player's GY, except this card, to your field when an opponent's monster declares an attack, but send it to the GY during the End Phase.|
|Clear Kuriboh||Discard this card to negate the activation of your opponent's monster effect that would inflict damage. Banish this card from your GY when an opponent's monster declares a direct attack to draw 1 card, Special Summon it if it is a monster, and change the attack target to it.|
|Junkuriboh||Send this card from your hand or field to the GY to negate the activation of your opponent's card or effect that would inflict damage to you and destroy that card.|
|Kuriboh||Discard this card during your opponent's turn to prevent yourself from taking battle damage.|
|Kuribohrn||Discard this card at the end of the Battle Phase to Special Summon 1 monster from your GY that was destroyed by battle and sent there this turn. Banish this card from your GY to Special Summon any number of "Kuriboh" monsters from your GY when an opponent's monster declares an attack.|
|Linkuriboh||Tribute this card to change the ATK of an opponent's monster that declared an attack to 0 until the end of the turn.|
|Linguriboh||Tribute this card to negate the effect of your opponent's "Trap Card" and then banish it|
|Performapal Kuribohble||Special Summon this card from your hand when an opponent's monster declares an attack, change the attack target to it, and gain LP from that battle instead of taking damage.|
|Rainbow Kuriboh||Equip this card from your hand to an opponent's monster that declared an attack and prevent it from attacking while equipped. Special Summon this card from your GY when an opponent's monster declares a direct attack, but banish it when it leaves the field.|
|Relinkuriboh||Banish this card from your GY to prevent your monster from being destroyed by battle.|
|Sphere Kuriboh||Send this card from your hand to the GY to change an opponent's monster that declared an attack to Defense Position.|
|Winged Kuriboh||Prevent yourself from taking battle damage during the turn this card on the field is destroyed and sent to the GY.|
|Winged Kuriboh LV9||Special Summon this card from your hand as Chain Link 3 or higher.|
|Winged Kuriboh LV10||Tribute this card during your opponent's Battle Phase to destroy all Attack Position monsters they control and inflict damage to them equal to the combined original ATK of those destroyed monster(s).|