Plankton

Sheldon Plankton, better known as Plankton is a villain on Spongebob Squarepants. He owns the Chum Bucket, has a computer wife named Karen, and a daughter whale Pearl. He always tries to steal the Krabby Patty Secret Formula from Mr. Krabs, the owner and manager of the Krusty Krab, but always fails. He used to be best friends with Mr. Krabs when they were kids, but now they are arch enemies. Plankton's birthday is January 12th.