4200. Sheldon James Plankton

Sheldon James Plankton or simply Plankton, is the main antagonist in the American television cartoon series SpongeBob SquarePants. He is voiced by Mr. Lawrence. The character is also in video games and other media based on the series. Additionally, he has been featured on countless toys, games, dolls, and other popular merchandise items. Plankton is the arch-nemesis, but former best friend, of Mr. Krabs. He operates a struggling restaurant called the Chum Bucket.

Chum Bucket
He operates a struggling restaurant in the series called the Chum Bucket, located directly across the street from the Krusty Krab. His primary goal in the series is to steal the Krabby Patty[5] secret formula and put Mr. Krabs out of business. Plankton succeeds at stealing the recipe in the movie, but his goal of world domination is thwarted by SpongeBob. In "Friend or Foe," it was revealed that Mr. Krabs and Plankton were once best friends, but a dispute over the Krabby Patty recipe ended their friendship.

Family
Plankton has a large extended family, containing more than 10,000 members of different forms of plankton, most of whom are supposedly from Texas and a character that people might consider hillbillies. It is from them that the audience learns his full name, Sheldon J. Plankton. He is also married to his super computer wife, Karen.