
Sheldon James Plankton, better known as Plankton, is a villain from SpongeBob SquarePants and Mr. Krabs' archenemy and former childhood friend. He was voiced by Douglas Lawrence, who also voiced Edward Platypus, Dave, Ping Pong, and Nurse Leslie in Camp Lazlo (2005-2008), and Filburt Shelbach in Rocko's Modern Life.
- SpongeBob SquarePants characters
- Villains
- Cyclops
- Evil Vs. Evil
- Affably Evil
- Egotist
- Rivals
- Male
- Antagonists
- Nemesis
- Characters from the past
- Seekers of Vengeance
- Remorseful Characters
- Anti-Villain
- Cartoon characters
- Big Bads
- Scapegoats
- Obsessed
- Suicidal
- Envious
- Incriminators
- Saboteurs
- Thieves
- Weaklings
- Failure-Intolerant characters
- Sadists
- Hegemony
- Traitors
- In love Characters
- Paranoid characters
- Cowards
- Anthropomorphic Characters
- Torturers
- Smugglers
- Bullies
- TV Show Characters
- TV Show villains
- Movie Villains
- Film characters
- Brainwashers
- Cheaters
- Wrathful
- Characters with mental illness
- Liars
- Tricksters
- Mongers
- Kidnappers
- Dictators
- Tyrants
- Strategic
- Businessmen
- Business characters
- Betrayed characters
- Homicidal maniac
- Living characters
- Living Villains
- Imprisoned
- Outcast
- Gaolers
- Destroyers
- Corrupting Influence
- Greedy characters
- Titular characters
- Arrogant characters
- Slavedrivers
- Slaver
- Mischievous characters
- Oppressors
- Bond Destroyers
- Crossover Characters
- Crossover Villains
- Extortionists
- Poachers
- Bosses
- Animal Cruelty
- Book characters
- Conspirators
- Starvers
- Delusional
- Honorable characters
- Master Manipulator
- Aristocrats
- Superorganism
- Psychological Abusers
- Charismatic
- Neutral Evil
- Criminals
- Pirates
- Control Freaks
- Doctors/Scientists
- Archenemy
- Stalkers
- Possessors
- Con Artists
- Propagandists
- Brutes
- Terrorists
- Nickelodeon characters
- Leaders
- Destroyer of Innocence
- Supervillains
- Spies
- Masterminds
- Masters of Disguise
- Internet characters
- Slaveholders
- Determinators
- Mad Scientist
- Childhood Friends
- Blackmailers
- Evil from the past
- Reformed Characters
- On & Off
- Inventors
- Fallen characters
- Fallen Heroes
- Heroes turned to the Dark Side
- Cult Leaders
- God Wannabe
- Iconic characters
- Characters voiced by Mr. Lawrence
- Multicolored Eyes
- Fathers
- Characters who are biologically related to the hero
- Related to Hero
- Hypnotists
- Supremacists
- Hypocrites
- Idiots
- Thugs
- 1996 Characters Debuts
- Barefoot Characters
- Straights
- 1990s Characters
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