Sinister Slug

The Sinister Slug first appeared in the episode:Mermaid Man and Barnacle Boy II. He also made a second appearance in The Bad Guy Club for Villains. He is a slug that most likely lives in sewers. His appearance in a game is The Yellow Avenger where you have to confront him in Jellyfish Fields.


He has red eyes, and resembles a green worm. He also has very sharp teeth.

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