Sheldon Plankton, also known as just Plankton, is an animated character in the show Spongebob Squarepants . He appears not only in the show, but also in Spongebob Squarepants video games and movies. He is the rival of Mr. Krabs, and his main goal is to steal the Krabby Patty recipe from Mr. Krabs to put him out of business, since he owns an unsuccessful restaurant called the Chum Bucket right across from Mr. Krabs' restaurant the Krust Krab. Plankton and Mr. Krabs used to be friends, but an argument over the Krabby Patty recipe ended their friendship. Plankton also has a computer wife named Karen, who has a mind of her own, and he also has a large family of hillbillies.

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