Sheldon Plankton (voiced by Mr. Lawrence) and Karen Plankton (voiced by Jill Talley) are the owners of the Chum Bucket, an unsuccessful restaurant located across the street from the Krusty Krab. Their business is a commercial failure because they sell mostly inedible foods made from chum. Plankton is a small planktonic copepod and the self-proclaimed archenemy of Mr. Krabs. His ultimate goal is to steal Krabs' secret formula for Krabby Patties, run the Krusty Krab out of business, and take over the oceanic world, but he never permanently succeeds, usually due to either SpongeBob and/or Krabs' efforts, his own incompetence and immaturity, or his own small size (except, temporarily, in The SpongeBob SquarePants Movie). Plankton is a skilled inventor and possesses a Napoleon complex due to his short stature. Karen is Plankton's own invention, a waterproof supercomputer who is more competent that Plankton, being the brains behind most of his evil plans to steal Krabs' secret recipe. She is married to Plankton and usually takes residence in the Chum Bucket laboratory. Karen speaks with a pronounced Midwestern American accent.
All Credit goes to Nickelodeon
