Sheldon J. Plankton
Full name
Sheldon James Plankton
Other names
Bug Mr. Plankton Dr. Peter Lankton Plank-Ton Planktonella Cashina Krabs Professor Plankton The Amazing Plankton Grammy-Maw Shelly Plankteron (by Plankrab) Tiny Cyclops (by Squidward)
Distinguishing Features
A green plankton with a big eye, a red pupil, two antenas, skinny arms and tiny legs
Occupation
Villain Co-owner and co-founder of the Chum Bucket
Alignment
Bad, sometimes Good/Neutral
Affiliations
Plankton family
Goal
Steal the Krabby Patty Secret Formula (ongoing)
Parents
Mama Plankton (mother) Gordon Plankton (father)
Partner(s)
Karen Plankton (wife)
Children
Chip Plankton (son with Karen) Plankrab † (clone/creation)
Relatives
Planktonamor (medieval ancestor) Dead Eye Plankton † (ancestor) Grandpa Plankton (grandfather) Ella Plankton (grandmother) Silas Plankton (uncle) Clem Plankton (cousin) Fredrick (father-in-law) E.M.I.L.P. (mother-in-law) Chip (grandfather-in-law)
Pets
Spot (amoeba) Unnamed golden labrador
Minions
Karen Plankton (wife/on & off partner)
Enemies
Eugene Krabs (arch-nemesis),
SpongeBob SquarePants , Karen 2,
Patrick Star ,
Sandy Cheeks ,
Squidward Tentacles , PlanKrab, King Poseidon,
Danny Phantom ,
Jimmy Neutron ,
Timmy Turner
Likes
Success, Karen, Spot, messing with Eugene Krabs, being evil
Dislikes
Eugene Krabs, failure, being "launched," not getting the Krabby patty, being pushed around or stepped on
Movies
The SpongeBob SquarePants Movie The SpongeBob Movie: Sponge Out of Water
TV Series
SpongeBob SquarePants
Video Games
SpongeBob SquarePants: Battle for Bikini Bottom The SpongeBob SquarePants Movie SpongeBob SquarePants: Lights, Camera, Pants! SpongeBob SquarePants: Creature from the Krusty Krab Nicktoons Unite! SpongeBob SquarePants: SuperSponge SpongeBob SquarePants featuring Nicktoons: Globs of DoomNicktoons Racing
Source
Sheldon J. Plankton is the main antagonist of the SpongeBob SquarePants franchise. He is the owner of the Chum Bucket, alongside his computer wife, Karen , which is across the street from the Krusty Krab. Due to this, Plankton had become the business arch rival of Krusty Krab's owner, Eugene Krabs. He attempts to steal the Krabby Patty secret formula in order to drive Krabs out of business and aim for world domination. It is revealed in the season 5 episode, Friend or Foe that he and Mr. Krabs were friends before a falling out caused them to become bitter enemies.