Character Name: (Sheldon J.) Plankton

Location: Chum Bucket Restaurant (across the street from the Krusty Krab), Bikini Bottom

Occupation: Owner of Chum Bucket (which nobody eats at)

Interests: Making plans and attempts to steal the Krabby Patty formula, world domination, bombs, holographic meatloaf

Personality: Mean, evil-minded, failure at everything he does, lonely

Physical Appearance: Green, tiny in height, one-eyed, two antennas, oval-shaped

Family: Karen (his computer wife) and many hillbilly relatives

Friends: None

First Episode Appearance: "Plankton!"

Voiced By: Mr. Lawrence

Other Info: Stole King Neptune's crown and blamed his act on Mr. Krabs. Used a robot to disguise himself as Mr. Krabs to get the Krabby Patty formula. Hired Patrick to work at the Chum Bucket. Took Mr. Krabs to court after slipping on some water at the Krusty Krab. Became friends with SpongeBob. Rounded up all of his relatives to help invade the Krusty Krab. Became SpongeBob's psychiatrist to get the Krabby Patty recipe. Won SpongeBob to be a frycook at the Chum Bucket. Tried acquiring Goo Lagoon as land for his new restaurant. Got the Krabby Patty formula and made the Chum Bucket a success. Literally took over SpongeBob's mind. Received a valentine from SpongeBob. Switched lives with Mr. Krabs. Flooded and froze the Krusty Krab. Tricked SpongeBob, Patrick and Squidward into fixing up the Chum Bucket. Used mind control on Mermaidman and Barnacleboy. Dated Mama Krabs. Formed a band with SpongeBob, Patrick and Squidward in order to get the secret formula. Turned the Krusty Krab into a Roman colleseum. Turned SpongeBob, Squidward and Mr. Krabs into babies. Tried to attack the Krusty Krab with a robot he had made from a hairdryer and toaster but it came unplugged accidently.

Appearances:

Plankton!
Culture Shock / F.U.N.
Sleepy Time
Valentine's Day
Walking Small
Christmas Who?
Imitation Krabs
Band Geeks
The Fry Cook Games
Mermaid Man and Barnacle Boy IV
Welcome to the Chum Bucket
Snowball Effect
The Algae's Always Greener
Krusty Krab Training Video
Party Pooper Pants
The Sponge Who Could Fly
Plankton's Army
SpongeBob Meets the Strangler
The SpongeBob SquarePants Movie
Fear of a Krabby Patty
Krabs vs. Plankton
Mermaidman and Barnacleboy VI: The Motion Picture / Enemy In-Law
Patrick SmartPants
Dunces and Dragons (really, the appearance is by Plankton's ancestor, Lord Planktonimor, not Plankton himself)
Wishing You Well
New Leaf
Best Frenemies
Friend or Foe
Spy Buddies
Krabs a La Mode
Bucket Sweet Bucket
Atlantis SquarePantis
Goo Goo Gas
Mermaidman vs. SpongeBob
Pest of the West (the appearance is really of Plankton's old west ancestor, Dead Eye Plankton)
20,000 Patties Under the Sea
Banned in Bikini Bottom / Stanley S. SquarePants
Krabby Road
Spongicus
Patty Caper / Plankton's Regular
The Krabby Kronicle
Komputer Overload