SpongeBob SquarePants

BlackJack SquarePants

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on ESB


BlackJack SquarePants
General information
List of characters

BlackJack SquarePants is the cousin of SpongeBob, and the main antagonist of the episode "BlackJack." He is voiced by John DiMaggio.

Personality and Appearance

As kids, BlackJack was much larger than SpongeBob. However, when he met SpongeBob again he was only the size of SpongeBob's big toe. It is likely that he stopped growing when he was young, as evident by SpongeBob saying that he hasn't changed a bit. BlackJack has a very gruffly voice and is circled shaped, compared to SpongeBob's square shape and he also has very muscular arms for his small size. On his arms are anchor tattoos. He dresses up in Biker-Gang clothing (white shirt, red wristbands, blue jeans with belt buckle like SpongeBob's, and black cowboy-like boots). He has a pet worm, and lives in a cabin-like house only next door to his Uncle Blue SquarePants' house. BlackJack is known to be tough.

Relationship with SpongeBob

Cousin BlackJack is older and tougher than SpongeBob, and he used to be a bully to him and both of them had a sibling rivalry with each other. Blackjack also calls SpongeBob a "little man" not just because SpongeBob is younger than him, but due to the fact that SpongeBob used to not make any attempt to duel with him, and used to become scared stiff.

Relationship with Others

BlackJack is known to be a powerhouse. SpongeBob's parents were not scared of him at all. In fact, they find it fun that they play and chat together.

Prison time

BlackJack went to prison for littering, but was released from prison during the events of BlackJack.


  • BlackJack speaks similar to Macho Man and Hulk Hogan, possibly a combination of the two. The Macho Man was famous for his quote, "Oh, yeah!"
  • It's unknown how Blackjack stopped growing.
Sponges (VE)

BlackJack SquarePantsCaptain Blue SquarePantsEnsignGirly TeengirlGrandma SquarePantsGrandpa SquarePantsMargaret SquarePantsHarold SquarePantsPrimitive SpongeSherm SquarePantsSpongeBob's GrandsonSpongeBob SquarePantsSpongeBuck SquarePantsStanley S. SquarePantsSpongeGarSpongeTronDrifterTodd SquarePants

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