SpongeBob SquarePants is an American animated television series created by marine biologist and animator Stephen Hillenburg for Nickelodeon.
The series chronicles the adventures and endeavors of the title character and his various friends in the fictional underwater city of Bikini Bottom.
The series' popularity has made it a media franchise, as well as the highest rated series to ever air on Nickelodeon, and the most distributed property of MTV Networks.
Sheldon Plankton is a plankton who owns the Chum Bucket, the rival restaurant to the Krusty Krab. As the villain self-proclaimed archenemy to Mr. Krabs, he constantly tries to steal Krabs' secret recipe for Krabby Patties, but is always unsuccessful (except, temporarily, in The SpongeBob SquarePants Movie). Sometimes, not only does he wish to run Mr. Krabs out of business, but he also wishes to rule the world. His wife is Karen, a computer of his creation.