Bonz Bonz , known as " Ghost " Kotsuzuka in the Japanese version , " Ghost " Kozuka in the English manga and " Ghost " Bonz in the Singaporean dub of the anime , is one of Bandit Keith ' s former lackeys . Bonz ' s ghastly appearance is said to be caused by a glandular problem . Biography . Duelist Kingdom . In the Duelist Kingdom tournament , he along with Sid and Zygor were Bandit Keith ' s henchmen after he agreed to share his expertise with the young Duelists so that all four of them would advance to the finals . Keith wanted revenge against Maximillion Pegasus for humiliating him in the final match of the Intercontinental Championship . In secret , Keith merely wanted to use them for their Star Chips . Under Keith ' s tutelage , all three Duelists win Duels on the first day of the tournament , with Bonz at a total of four Star Chips . When Keith learned that Yugi Muto , Joey Wheeler , and their friends had entered the tournament as well , he believed they would impede them , and sought to eliminate them . Bandit Keith later found a secret Graveyard field , and chose Bonz to play in it because it suited his Ghost Deck . Because Keith was initially unimpressed by Bonz ' s Deck , he lent Bonz him some of his own cards to improve it , including his trump card , " Call of the Haunted " . Meanwhile , Sid and Zygor looked for Joey , believing him to be an amateur . When Joey ran away from the group towards a waterfall , Zygor beat him unconscious . Joey woke up in cave with a Dueling Arena , complete with a Graveyard field . Bonz challenged Joey to a Duel and tricked him into thinking that he must accept . Bonz had the upper hand , as his Zombie - Type monsters gained a 30 % ATK bonus from the Graveyard Field , and when they were destroy ed , they just regenerated , and gained ATK from " " . However , when Yugi and their friends arrived , Joey managed to figure out the Zombies ' main weakness ; that their DEF is 0 . Joey used " Shield and Sword " to switch their ATK and DEF values , and won the Duel . Bandit Keith then locked them in , beat up his three companions , took their remaining starchips , and entered the Duelist Kingdom Finals himself , having abandoned the three , saying that they had outlived their usefulness to him . Battle City . Bonz , along with Sid and Zygor , were then seen right before the Battle City finals . The three stayed in a nearby cemetery and tricked people into giving up their Locator Card s . However , Yami Bakura was not intimidated by their act and challenged them to a Duel in which the winner takes all the Locator Cards , and thus may enter the Battle City Finals directly . Bonz had the advantage at first , but Bakura won quickly after . He then banished them to Hell ( the Shadow Realm in the English dub ) . It ' s unknown if they were ever released from their imprisonment . In the Game app Duel Links , it is revealed Bonz was released and shown to be alive . ( It ' s also most likely the other two were released as well ) . Yu - Gi - Oh ! 5D ' s . In " Yu - Gi - Oh ! 5D ' s " , a parody of him named Ghost Takarazuka is listed as one the Duelists defeated by Hunter Pace . Other appearances . Bonz is seen in " Yu - Gi - Oh ! Nightmare Troubadour " for the Nintendo DS . He has again a Deck made up of Zombies and support cards . He is ranked as ' Feeble ' . Deck . Anime and manga . Bonz uses a Deck of Zombie - Type monsters . During Duelist Kingdom his Deck was enhanced with cards given by Bandit Keith , who coached Bonz for much of his Duel with Joey . The Deck relied on Keith ' s " Call of the Haunted " to revive the non - Zombie monsters placed in Bonz ' s Deck as Zombie - Types , making them immortal and boosting their ATK whenever they were destroyed . Bonz further enhanced them with " Pumpking the King of Ghosts " . In Battle City , Bonz used " Great Mammoth of Goldfine " and a handful of new undead - themed cards such as " Nightmare ' s Steelcage " and " Skull Invitation " , but was outmatched against Yami Bakura ' s Occult Deck . When Seeker was looking up a Duelist ' s rarest cards on his laptop , " Call of the Haunted " was still listed as his rarest card . Video games . The Duelists of the Roses . Bonz ( as Necromancer ) plays a Zombie Deck . All his monsters are powered by the Wasteland terrain . His Deck Leader , " Pumpking the King of Ghosts " increases the ATK of all his Zombies near him by 500 . The Pumpking in his Deck allows gives his monsters a 100 ATK boost each round . The Dawn of Destiny . Bonz ' s signature card is shown to be Crass Clown , despite him not using it in the game .