Ghost Kozuka ( manga ) Ghost Kozuka , known as Ghost Kotsuzuka in the Japanese version , is a character in the " Yu - Gi - Oh ! " manga . This is the original depiction of Ghost Kozuka , known as Bonz in the English anime . Kozuka is a Duelist , nicknamed " Ghost " for his use of ghost - like " Duel Monsters " cards . He took part in the Duelist Kingdom tournament , where he , Takaido and Satake teamed up with Bandit Keith , who helped them at first , before later turning on them . He also took part in the Battle City tournament , where he was defeated and killed by Dark Bakura . Biography . Duelist Kingdom . Kozuka took part in the Duelist Kingdom tournament . Here he met up with , Takaido , Satake and Bandit Keith Howard . Keith was the former United States champion , but had not been invited to the tournament . He offered to help the Kozuka , Takaido and Satake earn forty Star Chip s between them , so that the four of them could enter Pegasus Castle , as the semifinalists . With his help they had earned four , five and five Star Chips respectively , before Kozuka and Satake spotted a group of people , including Yugi Mutou , while searching for opponents . They informed Keith of their find , but thought they were better avoiding this group , as Yugi would be too difficult to defeat . However , Keith suggested that they separate the other Duelist from that group , Katsuya Jonouchi and force him to Duel in the hidden underground crypt . As the crypt had a Graveyard terrain , which strengthened undead cards , Keith suggested that Kozuka Duel , since his Deck was filled with Ghost cards . However , after looking through it , he said it would not suffice , so he lent Kozuka some of his own cards , to strengthen it . When Jonouchi left his friends to urinate in private , Kozuka , Takaido and Satake snuck up behind him , grabbed him and dragged him into the crypt . Kozuka imposed the wager of four Star Chips for the Duel . Kozuka planned on Summoning a Ghost card , but was stopped by Keith , who over the next three turns , insisted that he play non - Ghost cards , which were all weaker than Jonouchi ' s monsters . Kozuka then drew " Call of the Haunted " , which revived the destroyed monsters as Zombies , powered up by the Graveyard terrain and capable of resurrecting even stronger when beaten . When Kozuka was about to attack one turn , Keith suggested that he draw another card to try and power up the Zombies , even further first . Kozuka then got " Pumpking the King of Ghosts " , which powered up his Zombies every turn . Jonouchi played safe , but putting his monsters in Defense Mode , but Kozuka eventually drew " Stop Defense " . Jonouchi used " Red - Eyes Black Dragon " to destroy " Pumpking " and on his last turn , used " Shield and Sword " , which switched the ATK and DEF of all monsters . The Zombies , which only attacked based on instinct , were incapable of defending and as such had 0 DEF , which became their new ATK . This gave Jonouchi an opening to damage Kozuka ' s Life Points and win the Duel . After exiting the crypt , Keith then ordered Kozuka , Takaido and Satake to block the exit with a boulder , trapping Jonouchi , Yugi and their friends inside . They obeyed , but Kozuka wondered if they had went too far . Keith then moved on to his " next order of business " and proceeded to beat up Kozuka for losing , kicking him in the stomach . Kozuka pleaded that he had only played the cards Keith told him to , but Keith insisted that he should have won in that case and kicked him in the face . As Kozuka lay on the ground , Keith spat on him and commented that without his Star Chips , he was useless and should just die . Keith also took Takaido and Satake ' s Star Chips and beat them up , leaving the three lying on the ground in pain , while he went to Pegasus Castle alone . Battle City . " Ghost " Kozuka was one of the many Duelists who migrated to Domino City at the rumor of a new " Duel Monsters " tournament being announced by Seto Kaiba at Domino City Museum . The next day , Kozuka was present at the opening ceremony of the Battle City tournament , with the rest of the eligible Duelists . During the actual tournament , he Dueled Dark Bakura shortly before the championship stages , but his Ghost Deck was easily overpowered by Dark Bakura ' s Occult Deck . Kozuka lost the Duel and his Puzzle Cards . As a Penalty Game , Dark Bakura took his life , using the Millennium Ring . Duel Links . In the game Duel Links , Bonz is revealed to have survived Battle City and reappears as a playable character . However , his encounter with Bakura has left him frightened . Deck . Kozuka used a Ghost Deck , during Duelist Kingdom . However Bandit Keith considered it insufficient for his Duel against Katsuya Jonouchi and lent him cards to make it more powerful . His new Deck contained a number of non - Ghost monsters , which he was able to revive through " Call of the Haunted " , as near - unkillable Zombies . The Graveyard terrain and " Pumpking the King of Ghosts " made them stronger . The last part of the combo was " Stop Defense " , to ensure the Zombies could damage the opponent ' s Life Points . In Battle City , Kozuka still used a Ghost Deck . However , none of his cards were shown . Duels . Kozuka took part in the following Duels .