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Sheldon James Plankton, better known as Plankton, is one of the main antagonists (alongside his computer wife, Karen Plankton) who appears in the animated series SpongeBob SquarePants. He is Mr. Krabs' archenemy and former childhood friend. He is voiced by Doug Lawrence, who also voiced Edward Platypus, Dave, Ping Pong, and Nurse Leslie in Camp Lazlo (2005-2008), and Filburt Shelbach in the animated series Rocko's Modern Life.

He is the main antagonist of the franchise. There are also several episodes in which Sheldon J. Plankton acts as a sympathetic anti-hero. Sheldon J. Plankton despises his rival, Eugene H. Krabs, for running a successful restaurant because his own business rarely gets any customers. His main goal is to steal Eugene H. Krabs' secret formula for Krabby Patties and running Eugene H. Krabs out of business. Karen gives him a variety of plans to steal it, but their efforts always end up failing in the process.

Sheldon J. Plankton succeeds at stealing the formula in The SpongeBob SquarePants Movie, but his goal of world domination is eventually thwarted by SpongeBob SquarePants. In "Friend or Foe," it is revealed that Eugene H. Krabs and Sheldon J. Plankton were best friends during their childhood, but a dispute over the Krabby Patty secret formula ended their friendship for real, meaning that Sheldon J. Plankton had a part in the creation of the Krabby Patty.

Trivia[]

  • Both Sheldon J. Plankton and Karen Plankton first appear in the episode Plankton!.
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