Ganzack is the crab-armored captain of the Ganzack Pirates and the villain of the original One Piece OVA. Obsessed with firepower and the Pirate King title, he enslaves an island before Luffy ends his reign.
Of ordinary stature beneath his gear, Ganzack straps a crustacean-styled shell across his back, fitted with shoulder gauntlets that end in massive crab claws. Underneath sits a red shirt, with blue trousers and a blue cape completing the look. His purple hair is bound back in a ponytail to match his purple beard, a crimson ring circles each eye, and an X-shaped scar marks his left temple. A black pirate hat bearing his Jolly Roger tops it all off.
Ruthless and full of himself, Ganzack chases the Pirate King crown and is willing to enslave whole islands or murder children to reach it. His creed places raw military might above treasure, and he styles himself the Pirate Shogun while sneering at pirates who care only for quick loot. That same arrogance makes him a sucker for flattery, often ordering his crew to laugh along with his gloating, and just as quick to bristle at insults. He is especially touchy about any comparison to a crab and loses his composure whenever someone makes one.
Ganzack can hold his own against Luffy for short stretches and shrugs off heavy blows, recovering in moments from an attack that had flattened the much larger Richie. By some unexplained means he also commands the Plesiosaur, a savage sea beast he rides. His real edge is his armor: the pincers hide blades that pierce plate and track his every swing, while the legs fire bullets, chains, and an unbreakable adhesive foam, and the limbs can fold over him into a bulletproof shield. He happily supplements this with flintlocks and prizes the cannons of his warship, above all the island-shattering Devil's Tower.

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Ganzack is the crab armored captain of the Ganzack Pirates and the villain of the original One Piece OVA, Defeat Him! The Pirate Ganzack. Obsessed with firepower and the title of Pirate King, he enslaves an island before Luffy puts an end to his reign.
In the OVA Defeat Him! The Pirate Ganzack, the castaways Luffy, Zoro, and Nami wash ashore on an island enslaved by the pirate Ganzack. Nami infiltrates his crew to help free the villagers, and Luffy ultimately defeats Ganzack after his warship and its Devil's Tower cannon are destroyed.
Ganzack's crab styled armor hides blades in its pincers that can pierce plate and track his swing, while its legs fire bullets, chains, and an unbreakable adhesive foam. The limbs can also fold over him to form a bulletproof shield.
Ganzack is especially touchy about being compared to a crab and loses his composure whenever someone makes the comparison, despite wearing crab styled armor with massive claw gauntlets. He otherwise craves flattery and often has his crew laugh along with his gloating.
Yes, Ganzack later reappears asleep in a bar during Uta's concert in the film One Piece Film: Red. This is a brief cameo long after his defeat in the original OVA.
Looking for more on Ganzack? The One Piece Wiki on Fandom has a dedicated page with community notes.
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