Plankton

Plankton (full name Sheldon J. Plankton) is the main villain of the television series Spongebob Squarepants, and its associated movie. He is the business rival of Mr Krabs (the owner of the restaurant where Spongebob works, the Krusty Krab). While the Krusty Krab is popular among the sea creatures of Bikini Bottom, Plankton's own restaurant, the Chum Bucket, has very few customers. He is voiced by Mr. Lawrence (or Doug Lawrence).

Plankton constantly attempts to steal the formula for the Krabby Patty, the delicious burger-like food that is sold in the Krusty Krab. Plankton believes that the Krabby Patty is the reason for the Krusty Krab's success, and that his Chum Bucket would be equally popular if it sold the Patties as well. However, ensuring the success of his business is only the first step in Plankton's plan, which will culminate in him ruling the ocean.

In The Spongebob Squarepants Movie, Plankton does manage to steal the formula from Krabs, and the Chum Bucket becomes just as popular as the Krusty Krab had been previously. He even comes close to his eventual goal of ruling the sea, by giving away mind-controlling bucket hats free with his Krabby Patties. He is eventually thwarted by Spongebob and Patrick using the song Goofy Goober to save their friends from Plankton.

Plankton owns extremely advanced technology. It is unknown how he funds this, as the Chum Bucket is unpopular until he steals the formula. His wife is a computer, aptly named "Computer Wife" or "Karen." where she is voiced by Jill Talley.

Fun Facts
Plankton found Mr. Krabs' life to be worse than his life (because Plankton ruins Mr. Krabs' life), when he experienced it in The Algae's Always Greener and Spy Buddies. In The Algae's Always Greener, he found lots of reasons that make Mr. Krabs' life difficult:


 * SpongeBob is always asking him for a Weekly Performance Review on Tuesday and makes a teensy little temper tantrum if Plankton refuses. He also keeps yelling "SOILED IT! SOILED IT! SOILED IT!" when he accidentally gave a customer a large soda when the customer wanted a medium soda


 * Squidward, the lazy grumpy pessimistic worker at the restaurant complains at Plankton he doesn't want to work with SpongeBob. Later, when Plankton put him in charge of fry cooking, a customer got angry because the Krabby Patty that Squidward cooked was very ugly, disgusting-looking, and hideous.


 * Pearl, his virtual reality daughter throws a big temper tantrum because she doesn't get more than $1.


 * Krabs tries to steal the Krabby Patty formula (which Plankton actually does in the show's reality), and Krabs NEVER gives up.