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  • Ghost Kozuka (manga)
  • Bonz (anime)
Japanese translatedGhost Kotsuzuka
OtherGhost Bonz
RōmajiGōsuto Kotsuzuka
  • Male
  • Duelist
Tournament Position
Duelist Kingdom Did not place
Battle City Did not place
Manga DeckGhost
Anime DeckZombie counterpart
Other Decks
  • Spook and Boo
  • Zombie Deck
WC 2004Traps
Manga debutYu-Gi-Oh! Duel 08888 (Duelist Duel 29): "The Lurking Duelists"
Anime debutYu-Gi-Oh! episode 01717: "Arena of Lost Souls, Part 1"
Video game debutYu-Gi-Oh! The Sacred Cards
Voice actors
  • Amy Birnbaum[1]
Other languages
  • Gerald Schaale

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.


Duelist Kingdom[edit]

Bonz in the Duelist Kingdom tournament

In the Duelist Kingdom tournament, he, Sid and Zygor became 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; unbeknownst to his henchmen, 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 initially, as his Zombie-Type monsters gained a 30% ATK bonus from the Graveyard Field, and when they were destroyed, they just regenerated, and gained ATK from "Call of the Haunted". However, when Yugi and their friends arrived, Joey managed to figure out the Zombies' main weakness: 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 the cave, before beating up his three companions and taking their remaining Star Chips to enter the Duelist Kingdom Finals himself, saying that they had outlived their usefulness to him.

Battle City[edit]

Bonz, along with Sid and Zygor, are seen right before the Battle City finals. The three stayed in a nearby cemetery and tricked people into giving up their Locator Cards. 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. Bonz had the advantage at first, but Bakura won quickly, and then banished them to Hell; the dub instead has them being imprisoned in the Shadow Realm, and it is left unknown if they were ever released.

Yu-Gi-Oh! 5D's[edit]

In Yu-Gi-Oh! 5D's, a parody of him named Ghost Takarazuka is listed as one the Duelists defeated by Hunter Pace.[2]

Other appearances[edit]

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'.


Anime and manga[edit]

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[edit]

The Duelists of the Roses[edit]

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 Sacred Cards (Duel Monsters 7: The Duelcity Legend)[edit]

Duel Monsters 8: Reshef of Destruction[edit]

World Championship Tournament 2004[edit]

The Dawn of Destiny[edit]

Bonz's signature card is shown to be Crass Clown, despite him not using it in the game.


Opponent(s) Episode(s) Outcome(s)
Unknown Duelist 17 Win
Joey Wheeler 17-18 Lose
Yami Bakura 79 Lose


  • In the English dub, Bonz's ghastly appearance is said to be caused by a glandular problem.[3]


  1. "Bonz Character Profile". Official Yu-Gi-Oh! Site. Retrieved 15 June 2022.
  2. Yu-Gi-Oh! 5D's episode 0011: "On Your Mark, Get Set, DUEL!"
  3. Yu-Gi-Oh! episode 01717: "Arena of Lost Souls, Part 1"


  1. a b c Not played as an actual card; revived zombie counterpart
  2. a b This card was used as a Magic Card in the original Japanese version. It is a Trap Card in the worldwide dub and TCG/OCG
  3. Seen on Seeker's laptop in episode 56