Katsuya Jonouchi and Seto Kaiba ' s Duel ( manga ) Katsuya Jonouchi and Seto Kaiba faced each other in a game of " Duel Monsters " , in the " Yu - Gi - Oh ! " manga . It took place during the Duelist Kingdom tournament , but was not a tournament Duel . It was the first Duel shown using Duel Disk s . Events . Prior . During the first night of the Duelist Kingdom tournament , Katsuya Jonouchi , Yugi Mutou , Hiroto Honda , Ryo Bakura and Mai Kujaku were woken by the sound of a helicopter landing on the island . They all went over the helicopter and discovered Seto Kaiba had piloted it . Yugi went over to Kaiba and gave him his Deck , which he had recovered from the Ventriloquist of the Dead . As Kaiba was about to leave , Jonouchi stopped him and refused to let him leave , reminding him of what he did during Death - T . Kaiba said he had almost forgotten Jonouchi was there too and mocked the level of the Duelist Kingdom tournament on seeing that Jonouchi was a participant . As Yugi and Honda restrained Jonouchi , he threatened to Duel Kaiba . Kaiba accepted , but warned Jonouchi that he would damage his ego . Jonouchi tried directing Kaiba to a Battle Box , but Kaiba insisted that they use his Duel Disk s prototypes instead . Kaiba explained that the rules would be similar to the Standard " Duel Monsters " rules , but the concept of the field would be different . The Duel . Kaiba ' s turn Kaiba Summon ed " Battle Ox " in Attack Mode in the Main Card Stage . He then threw the disk out in front of him , where it spun and produced the Solid Vision projection of " Battle Ox " . Yugi was impressed by how life - like the hologram was and how it could be produced without the need for a Battle Box . Jonouchi ' s turn Jonouchi Summoned " Armored Lizard " in Attack Mode in the Main Card Stage . " ' Kaiba ' s turn " " Battle Ox " and " Armored Lizard " engaged in battle , with " Battle Ox " plunging its axe into the neck of " Armored Lizard " . " Armored Lizard " seemed to survive at first , as the axe had not fully penetrated its scales . Kaiba said that that should not matter , since " Battle Ox " had a higher ATK . " Battle Ox " then raised its axe , carrying " Armored Lizard " with it and then slammed it back on the ground , this time fully penetrating the armor and decapitating the lizard , destroying it ( Jonouchi : 2000 → 1800 Life Points ) . The " Armored Lizard " card was ejected from the Duel Disk , leaving Jonouchi chase after it . Kaiba explained that when a monster loses , its controller is to jerk the wire on their Duel Disk to pull the disk back to them . Jonouchi did so and realizes the Duel Disk was like a yo - yo , which he considered himself to be good at using . Jonouchi ' s turn Jonouchi Summoned " Flame Swordsman " and got it to attack " Battle Ox " . However " Battle Ox " had a resistance to Fire , causing the " Flame Swordsman " to lose ATK ( " Flame Swordsman " : 1800 → 1500 ATK ) . " Flame Swordsman " was destroyed in battle ( Jonouchi : 1800 → 1600 Life Points ) . Kaiba ' s turn Kaiba activated " Polymerization " to power - up " Battle Ox " , by fusing it with " Mystic Horseman " , commenting that both cards were based on Greek myths . This created the " Rabid Horseman " . Jonouchi ' s turn Jonouchi Summoned " Swamp Battleguard " . Kaiba ' s turn " Rabid Horseman " attacked and destroyed " Swamp Battleguard " ( Jonouchi : 1600 → 1400 Life Points ) . Intermediate turns Over the next few turns , Jonouchi Summoned " Axe Raider " , an unseen card , " Battle Steer " and " Rock Ogre Grotto # 1 " , all of which were destroyed by " Rabid Horseman " , leaving Jonouchi with 550 Life Points . Jonouchi ' s turn Kaiba laughed and suggested that Jonouchi give up . Jonouchi also doubted he could win and dropped to one knee . His friends encouraged him to continue , including Mai , who without thinking scolded him for not standing up and fighting . Jonouchi drew " Red - Eyes Black Dragon " and Summoned it . Kaiba was somewhat surprised to see the " Black Dragon " . " Red - Eyes " attacked the " Rabid Horseman " and although it used a Fire attack , its ATK was enough to still beat the " Rabid Horseman " ( Kaiba : 2000 → 1600 Life Points ) . As Jonouchi and his friends celebrated Jonouchi ' s move , Kaiba mocked Jonouchi for being so happy over winning just one turn . Kaiba ' s turn Kaiba said he had been saving a card that could beat Jonouchi at any time and Summoned " Blue - Eyes White Dragon " . It attacked and destroyed " Red - Eyes Black Dragon " ( Jonuchi : 550 → 0 Life Points ) , causing Kaiba to win the Duel . Aftermath . Kaiba mocked Jonouchi , saying it was befitting for him to crawl on the ground , as a loser , and stated that Jonouchi ' s previous victories might have been credit to luck or help from his friends , but his fake confidence should now be ruined . Anzu retorted that it was not Kaiba ' s place to be critical , as he did not know what Jonouchi was fighting for . Bakura agreed and was about to tell Kaiba about Jonouchi fighting to pay for his sister , Shizuka ' s eye operation , but Jonouchi cut him off , insisting that he not tell Kaiba about that . Kaiba saw it as irrelevant , stating that even the weakest Duelist has some reason to fight or believe in , but all that matters is whether they allow themself to be crushed or fight to protect those crucial things . He warned Jonouchi that he will regret Dueling him and predicted that Jonouchi would be too afraid to stand up as a Duelist again . Jonouchi suffered a bad dream about his loss to Kaiba that night and was distraught by Kaiba ' s words during his next Duel with Ghost Kozuka . However , he was able to overcome this and defeat Ghost .