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* [[Lord of D.(anime)|Lord of DragonsD.]]* [[Kaiser Sea Horse (anime)|Kaiser Sea Horse]]

'''Seto Kaiba''', or just commonly referred to as '''Kaiba''', is one of the main characters of the series. He is the older brother of [[Mokuba Kaiba|Mokuba]]. [[Priest Seto]] is his Egyptian incarnate. He is the majority shareholder and CEO of his own multi-national gaming company, [[KaibaCorp]], and aims to become the world's greatest player of ''[[Duel Monsters]]''. To accomplish this goal, he must defeat his arch-rival, [[Yugi Muto]]. He is the modern-day lookalike reincarnation of [[Priest Seto]] himself, the original keeper of the mighty [[Blue-Eyes White Dragon(character)|Blue-Eyes White Dragon]].

Kaiba is largely considered an anti-hero, as his motives are usually ego-centric and his personality traits are selfish and arrogant, but he does sometimes help Yugi and his friends if it's in his best interest. Although there are a few occasions when he helps Yugi when faced with a common enemy. He also does appear to have ethics, as he does not believe in stealing from others to get ahead in life, proven in his duel against Zigfried. He has proven to strongly believe in hard work and determination, and dislikes people who steal or cheat.

[[File:Kaiba Linework.jpg|thumb|left|Kaiba's design incorporates multiple layers of clothing and a wide range of expressions. Depicted here is the [[duelistDuelist]] in the outfit he wears in the [[Battle City]] arc from front, side, and rear views and alongside views of his head from different angles.]]

Although Kaiba may seem very unkind toward his brother Mokuba, he has a brotherly love for him. When their adoptive brother Noah had hypnotized Mokuba into not remembering him and thinking Noah was his real brother, Kaiba revealed how much he cared about him to try to make him remember; in one Season 1 episode of the second series anime, after Pegasus is defeated, Kaiba tells Yugi that Mokuba "means everything to me". This is shown when Kaiba risks his own life by standing on a ledge to win the duel Duel against Yugi so that he can get to Pegasus to save Mokuba. Even when Kaiba preaches that no one gets away with trying to take over his company, he risks KaibaCorp when dueling Dueling Noah for Mokuba.

Also, Kaiba dislikes other people using his cards, namely his "[[Blue-Eyes White Dragon]]" (his favorite and [[signature card]]; notably, he uses its motif to decorate a large portion of his personal effects - e.g., [[Kaiba Land]], his jet, and his clothing). This is shown in [[Yu-Gi-Oh! - Episode 001]], when he rips up [[Solomon Muto]]'s Blue-Eyes White Dragon after winning it so that it could never be used against him, and also in [[Yu-Gi-Oh! - Episode 136]] when Kaiba becomes very angry when he finds out about Joey using his "Blue-Eyes White Dragon" in their Duel. Kaiba goes so far as to attack Joey's "Blue-Eyes White Dragon" with his own, destroying both in the process, to prevent Joey from using it for another turn. (He even says angrily, "I'm the only one with the skills necessary to wield a Blue-Eyes!" while doing so.) He also despises Pegasus' "[[Blue-Eyes Toon Dragon]]", saying it strips the original of all its pride. According to [[Kazuki Takahashi|Takahashi]], Kaiba's obsession with the "[[Blue-Eyes White Dragon (character)|Blue-Eyes White Dragon]]" stems from the feelings between [[Kisara]] (the girl whose Ka housed the Blue-Eyes) and his ancient Egyptian incarnate, [[Priest Seto]]. This may also be due to Kaiba's affinity for [[Dragon]]-Type monsters.<ref>''[[Yu-Gi-Oh!]]'' (bunkoban) Volume 21</ref> More likely than anything would be it having to do with wanting to have the strongest deck Deck possible out of any duelist Duelist as part of his domination motif, as he went through great lengths to acquire the three copies he presently has.

One of Seto's recurring traits is his absolute refusal to believe in the powers of magic often used in the series. Later on, during sagas like [[Waking the Dragons]], he openly admits to believing in all the supernatural events occurring around him, instead of just ignorantly saying they don't exist as he always does (although it is possible that he thinks that it's science instead of magic and doesn't hesitate to do something about it). Also, in the Japanese version of the ''[[Yu-Gi-Oh! The Movie: Pyramid of Light]]'', Kaiba stated at the end that the only reason he tried to destroy the ''[[Pyramid of Light]]'' card during his duel Duel with Yugi was because if the card really was magic, it would mean he didn't defeat Yugi using his own strength and he refused to win that way. However, the closest in the English version that Kaiba has come to this is "Maybe there is some truth to this junk" in the final episodes; however, when questioned by Joey, he quickly denies having said such a thing.

In the Japanese version, Kaiba is much more accepting of the powers of magic; for instance, in his final turn before defeating Alister in Waking the Dragons, he told Alister he should show him the power of a "true duelistDuelist" and of the "Chosen One", and also openly accepted the vision he and Yami Yugi had after their Egyptian Gods were destroyed, as well as the fact that their battle was destined over the span of 3000 years. During the duel Duel against Dartz, Kaiba destroyed the [[Mirror Knight Token]] after they had taken the form of Yugi, Pegasus, Joey, and Mai because of his belief if they were true duelistsDuelists, they would be willing to allow themselves to be destroyed in order to save the world, while in the English anime, Kaiba believed Dartz manipulated the holograms to resemble their friends in order to weaken their resolve. Although there are some instances where Kaiba is a believer in both the Japanese and English Anime. One such example would be during his final turn against [[Zigfried von Schroeder]] when he predicted he would draw exactly the spell cards he would need to defeat Zigfried, despite initially only having one card in his hand.

Understandably, Kaiba gains a lot of contempt and disdain from virtually every single person he knows (with the exception of Mokuba) - mostly Joey, Tristan and Tea in particular. Yugi constantly holds out hope for him, as does Yugi's other self Yami. Though Yami himself finds Kaiba's attitude and arrogance quite infuriating. As was shown on the times they've been forced to duel Duel together. Kaiba, for the most part, could not care less about what they think about him and returns the contempt in kind.

Kaiba also seems to take great pride in the duel Duel disks he developed as he would use them even when duel Duel rings are nearby by plugging it into the duel Duel ring's hologram projector so any card he plays on his duel Duel disk is displayed on the duel Duel ring instead of just using the duel Duel ring.

During Battle City, Seto's main goal is defeating Yugi in a duelDuel. However, when he lost, he decided on a new path, rather an old one, of building Kaiba Land all around the world. However, he vowed his battle with Yugi is far from over, even though they never had an on-screen duel Duel after this.

At some point, Kaiba wanted to help young duelists Duelists grow and built [[Duel Academy]] to accomplish this goal.

[[Maximillion Pegasus]] invited Kaiba as his special guest to the [[Intercontinental Duel Monsters Tournament]] in New York City. Kaiba witnesses Pegasus face [[Keith Howard|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 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 Dueling stations KaibaCorp is developing."<ref name="ep 16">{{episode|Yu-Gi-Oh!|16|ref}}</ref>

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 [[Kame Game|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 [[Solid Vision|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 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 [[Penalty Game|Mind Crush]] on Kaiba dispelling [[Ghost Kaiba|his evil half]].<ref name="ep 1"/> In the Japanese anime, the Mind Crush simply destroyed the evil in Kaiba so he can start over.

Later Kaiba snuck 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)|Duelist Kingdom island]] and Pegasus will be given shares of KaibaCorp once Yugi is defeated in the [[Duelist Kingdom|Duelist Kingdom tournament]]. Kaiba hacked into Pegasus' computer system and found Yugi was dueling Dueling an [[Ghost Kaiba|imposter Seto Kaiba]], who even had the real Kaiba's Deck.<ref name="ep 9"/> Kaiba infected a "Blue-Eyes White Dragon" Summoned by the imposter with a virus, weakening it and consequently preventing Yugi from losing the Duel.<ref name="ep 10">{{episode|Yu-Gi-Oh!|10|ref}}</ref>

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 duelingDueling. 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 B. Dragon|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.<ref name="ep 16"/>

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 Duel on the spot, but Pegasus refused telling Kaiba that he must defeat Yugi in a Duel, before he can do that.<ref>{{episode|Yu-Gi-Oh!|21|ref}}</ref>

Kaiba got ready to duel 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 Duel without the Disks.<ref>{{episode|Yu-Gi-Oh!|26|ref}}</ref> Pegasus defeated Kaiba while using his Millennium Eye. Kaiba privately asked Mokuba to forgive him as Pegasus trapped his soul in another "Soul Prison" card.<ref>{{episode|Yu-Gi-Oh!|27|ref}}</ref>

Kaiba thanked Yugi for saving Mokuba and insisted that they should have a fair Duel someday to determine who is the better duelistDuelist. He gave Yugi and his friends a lift home from the island afterwards.<ref>{{episode|Yu-Gi-Oh!|41|ref}}</ref>

Kaiba tested "[[Obelisk the Tormentor (original)|Obelisk the Tormentor]]", by dueling 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.<ref name="ep 54">{{episode|Yu-Gi-Oh!|54|ref}}</ref>

Kaiba invited duelists Duelists he thought to be good enough to participate in the tournament. All players were given the newest version of his [[Duel Disk]]s.<ref name="ep 54"/> 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.)<ref name="ep 56">{{episode|Yu-Gi-Oh!|56|ref}}</ref>

The [[Seeker|first Rare Hunter]] dueled Dueled Yugi. Kaiba found out the Rare Hunter was using fake cards, but still didn't disqualify him, as he needed to learn more about the Rare Hunters.<ref name="ep 56"/>

Kaiba followed Yugi and caught-up when Yugi was challenged to a Duel by two Rare Hunters, who couldn't decide which of them should face Yugi first. Kaiba appeared and told them to both duel 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 Card]]s and handed one to Yugi. He then offered to use KaibaCorp's satellite system to trace the location of Joey's Duel Disk.<ref>{{episode|Yu-Gi-Oh!|68|ref}}</ref>

They arrived at the [[Domino Pier]] and find Joey and Téa are possessed by Marik, with Joey prepared to duel Duel Yugi. Seeing the Duel had been set-up to kill the loser, Kaiba tried to call it off, but Marik disregarded his authority.<ref>{{episode|Yu-Gi-Oh!|75|ref}}</ref> Once [[Tristan Taylor|Tristan]] and [[Duke Devlin|Duke]] arrived at the Duel, Kaiba and Mokuba explained the situation to them.<ref>{{episode|Yu-Gi-Oh!|77|ref}}</ref> 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.<ref>{{episode|Yu-Gi-Oh!|78|ref}}</ref>

In the last of the quarter-finals Kaiba found out the eight finalist is [[Ishizu Ishtar]], as the two of them dueledDueled. 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.<ref>{{episode|Yu-Gi-Oh!|93|ref}}</ref> In the first few turns of the Duel, Kaiba had Ishizu send plenty of cards from her [[Main Deck|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 (character)|Blue-Eyes White Dragon]]" calling out to him, feeling it wanted him to Summon it. Kaiba saw a vision of [[Priest Seto|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 [[tribute]]d "Obelisk the Tormentor" to play "Blue-Eyes White Dragon", which he used to attack and defeat Ishizu.<ref>{{episode|Yu-Gi-Oh!|94|ref}}</ref>

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 Duels a [[Total Defense Shogun]] in a demonstration of the [[Deck Master]] rules, used in this virtual world.<ref name="ep 98"/> The Big Five separated the gang, by making holes appear under them.<ref name="ep 99">{{episode|Yu-Gi-Oh!|99|ref}}</ref>

Kaiba, Yugi, Joey and Marik partook in a [[Battle Royal]] to determine the matchups for the semi-finals. Each duelist 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.<ref name="ep 122" /> Since "[[The Winged Dragon of Ra (original)|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.<ref>{{episode|Yu-Gi-Oh!|123|ref}}</ref><ref>{{episode|Yu-Gi-Oh!|124|ref}}</ref>

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 Duelist atop his [[Duel Tower]]. Despite coming so close, his victory slipped away from him. Yugi compliments Kaiba on the Duel, but Kaiba said he doesn't want his pity. Yugi admitted Kaiba is a strong duelistDuelist, 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.<ref name="ep 135">{{episode|Yu-Gi-Oh!|135|ref}}</ref>

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 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.<ref name="ep 135" /> Regardless Joey put up a good fight. He annoyed Kaiba by taking control of one of his "Blue-Eyes White Dragons".<ref>{{episode|Yu-Gi-Oh!|136|ref}}</ref> 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. When Kaiba told Joey he never has any fun even in a duelDuel, Joey couldn't help but grin in amusement. This proved Kaiba was a more miserable person than Joey thought he was. (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.<ref name="ep 137">{{episode|Yu-Gi-Oh!|137|ref}}</ref>

Initially Kaiba had no intention of watching the final Duel between Yugi and Marik, but was confronted by [[Ishizu Ishtar|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 [[Tomb of the Nameless Pharaoh|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 Dueling for all the wrong reasons and never having fun anymore either.<ref name="ep 137" />

In his office, Kaiba thinks 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 tells Kaiba that someone has bought all of their stocks. [[Alister]], pretending to be [[Maximillion Pegasus|Pegasus]] calls Kaiba, claiming to be the one who bought the stocks, but he's not interested in Kaiba's company. He tells Kaiba that he must duel Duel him in Duelist Kingdom, or else, he will sell all of his stocks, ruining the Kaiba Corporation, and therefore, destroy his goal of building Kaiba Land.<ref>{{episode|Yu-Gi-Oh!|148|ref}}</ref><ref name="ep 149">{{episode|Yu-Gi-Oh!|149|ref}}</ref>

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.<ref>{{episode|Yu-Gi-Oh!|165|ref}}</ref> 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 duelingDueling. Alister vowed to hang Kaiba's soul on [[Mikey]]'s tombstone and the Duel began.<ref name="ep 166">{{episode|Yu-Gi-Oh!|166|ref}}</ref>

[[File:DMx166 Duel on top of the plane.jpg|thumb|left|Kaiba and Alister duel Duel on top of the plane.]]

Kaiba and Mokuba stopped at a car shop and hopped into [[Kaiba's car|a sportscar]]. The [[Car salesman|salesman]] tried to stop them, but Kaiba handed him a check for $500,000 and sped off.<ref>{{episode|Yu-Gi-Oh!|171|ref}}</ref> They were stopped by a group of [[Orichalcos Soldier]]s one block from the headquarters.<ref>{{episode|Yu-Gi-Oh!|172|ref}}</ref> Kaiba fought them off using "Blue-Eyes White Dragon" and "The Fang of Critias"<ref>{{episode|Yu-Gi-Oh!|173|ref}}</ref> 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 Dueling [[Raphael]].<ref>{{episode|Yu-Gi-Oh!|174|ref}}</ref>

After he lost, Kaiba's soul was inside a bubble being sucked into The Great Leviathan, along with some of the other lost souls.<ref name="ep 181" /> Once Yami defeated Dartz, the [[Legendary Knights]] freed the chosen duelistsDuelists; Yugi, Joey and Kaiba, from the Leviathan.<ref name="ep 182" />

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 duelistsDuelists.<ref name="ep 182" />

Kaiba, Yami and Joey Summoned a barrage of monsters to battle the leviathan<ref name="ep 182" /> and are accompanied by an army [[Dark Magician Girl (character)|Dark Magician Girl]] brought from the [[Duel Monsters Spirit World|Spirit World]]. However the Leviathan shot tendrils at the three duelists 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.<ref>{{episode|Yu-Gi-Oh!|183|ref}}</ref>

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 Duelists in the world, but, because of his busy schedule, he was not able to take part himself.<ref>{{episode|Yu-Gi-Oh!|185|ref}}</ref> He arranged it as a sixteen player knockout with the winner facing Yugi.<ref name="ep 186">{{episode|Yu-Gi-Oh!|186|ref}}</ref>

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 Dueling [[Rex Raptor|Rex]] and [[Weevil Underwood|Weevil]], who snuck in.<ref>{{episode|Yu-Gi-Oh!|189|ref}}</ref>

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 Dueling in the tournament in favor of embarrassing Zigfried on TV and challenged him to a Duel.<ref name="ep 194" />

As they dueledDueled, 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.<ref>{{episode|Yu-Gi-Oh!|195|ref}}</ref> Believing that Zigfried is no longer a threat, Kaiba didn't bother having him removed.<ref name="ep 196">{{episode|Yu-Gi-Oh!|196|ref}}</ref>

[[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 dueledDueled, 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.<ref>{{episode|Yu-Gi-Oh!|200|ref}}</ref>

[[File:DMx220 Kaiba offers to Duel.jpg|thumb|right|Kaiba offers to duel Duel Atem in the [[Ceremonial Battle]].]]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 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.<ref name="ep 220" />

Kaiba was unable to find any weakness in the God Cards and thought Yugi 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 Dueling for Yugi, while Yugi took the credit.)<ref name="ep 222" /> To Kaiba's astonishment, Yugi managed to destroy the three God Cards by repeatedly redirecting the "Lightning Blast" effect of "[[Slifer the Sky Dragon (original)|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 really 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.<ref>{{episode|Yu-Gi-Oh!|223|ref}}</ref>

Kaiba made a bet on his ownership of the school with [[Slade Princeton|Slade]] and [[Jagger Princeton]]. He was bold and had full confidence that the duelist 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).<ref>{{episode|Yu-Gi-Oh! GX|35|ref}}</ref>

While [[Lyman Banner]] was giving a history lesson, he mentions [[Yugi Muto|Yugi]] and Kaiba as the best duelists 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.<ref>{{episode|Yu-Gi-Oh! GX|40|ref}}</ref>

When Pegasus met [[Aster Phoenix]] at a party he listed Kaiba as one the best five duelists Duelists he has ever met. He considered Kaiba to be the second greatest after Yugi.<ref>{{episode|Yu-Gi-Oh! GX|107|ref}}</ref>

Kaiba's best known cards are his three "[[Blue-Eyes White Dragon (anime)|Blue-Eyes White Dragon]]s" and the [[Fusion Monster]] formed from the three dragons, the "[[Blue-Eyes Ultimate Dragon (anime)|Blue-Eyes Ultimate Dragon]]". The cards are central to Kaiba's Deck throughout the series. He relies on a [[Beatdown]] strategy to overwhelm opponents with high-powered monsters. His cards are intended to be mean and vicious to reflect Kaiba's personality.<ref>[http://www.timeforkids.com/TFK/kids/news/story/0,28277,388900,00.html timeforkids.com] Kazuki Takahashi, ''Yu-Gi-Oh!'' creator</ref> During [[Duelist Kingdom]] Kaiba's Magic and Trap cards supplement this strategy by disabling opposing monsters, such as "[[Shadow Spell (anime)|Shadow Spell]]" or "[[Defense Paralysis]]". Kaiba also uses a combo of "[[Saggi the Dark Clown (anime)|Saggi the Dark Clown]]" and "[[Crush Card Virus|Crush Card]]", destroying all monsters in his opponent's Deck with more than 1500 ATK, further crippling their ability to defend against him.

During [[Battle City]] Kaiba added "[[Obelisk the Tormentor (originalanime)|Obelisk the Tormentor]]" to his Deck, along with more [[Virus Cards]] like "[[Giant Germ](anime)|Giant Germ]" and "[[Virus Cannon (anime)|Virus Cannon]]". He also began using more cards with a technological theme like the [[VWXYZ|XYZ]] [[Unionmonster]] monsterss, "[[Enemy Controller (anime)|Enemy Controller]]" and "[[Interdimensional Matter Transporter (anime)|Interdimensional Matter Transporter]]", contrasting Kaiba's trust in technology against Yugi's Deck of mystical monsters like the "[[Dark Magician (anime)|Dark Magician]]". Kaiba continues to make use of his "[[Crush CardVirus (later DM anime)|Crush Card Virus]]" but instead of "Saggi" prefers "[[Shrink (anime)|Shrink]]" to weaken high powered monsters and Tribute them. Another combo he is fond of at this time is "[[Ring of Destruction (anime)|Ring of Destruction]]" and "[[Ring of Defense (anime)|Ring of Defense]]" to destroy enemy monsters and damage his opponent's [[Life Points]].

In ''[[Yu-Gi-Oh! The Movie: Pyramid of Light]]'', Kaiba adds the [[Pyramid of Light (anime)|Pyramid of Light]] to his Deck, using it to remove Yugi's [[Egyptian God Cards]] from play. He then depletes Yugi's Deck with a combo of "[[Peten the Dark Clown (anime)|Peten the Dark Clown]]" and "[[Deck Destruction Virus]]", and utilizes the ultimate another enhanced form of his "Blue-Eyes", "[[Blue-Eyes Shining Dragon (anime)|Blue-Eyes Shining Dragon]]".

While in the [[Virtual World]] Kaiba's Deck had a stronger focus on Dragon-[[Type]] monsters, adding "[[Spear Dragon (anime)|Spear Dragon]]", "[[Different Dimension Dragon (anime)|Different Dimension Dragon]]" and "[[Thunder Dragon (anime)|Thunder Dragon]]".

In [[Waking the Dragons]] Kaiba gained the "[[Fang of Critias]]". His Deck still focused on the "Blue-Eyes" and other Dragons, adding "[[Paladin of White Dragon (anime)|Paladin of White Dragon]]".

After Waking the Dragons Kaiba only Dueled twice more in the series, against [[Zigfried von Schroeder]] in the [[Grand Championship]], and later against [[Yami Bakura]]. Against Zigfried, Kaiba focused on removing his cards from play then returning them to the field with "[[Dimension Fusion (anime)|Dimension Fusion]]" en masse and using cards to regain life points Life Points such as "[[Soul Absorption (anime)|Soul Absorption]] " and "[[Emergency Provisions (anime)|Emergency Provisions]] " to counter the high costs of these cards. Kaiba also adds more dragons most notably "[[Chaos Emperor Dragon - Envoy of the End(anime)|Chaos Emperor Dragon]] " and uses its ability to devastate the opponent. Against Yami Bakura, Kaiba again relies on his "Blue-Eyes" and uses cards seen in previous season to summon Summon it.