Sheldon J. Plankton (character)

Sheldon J. Plankton is the main antagonist of Spongebob Squarepants.

Counterparts (Do not delete, but you can add)

 * Diesel (Thomas the Tank Engine and Friends)
 * Zorran (TUGS)
 * Sea Rogue (Salty's Lighthouse)
 * Bowser, Wario or Larry "Cheatsy" Koopa (Super Mario Bros.)
 * Dr. Robotnik Bokkun, Coconuts or Shadow the Hedgehog (Sonic the Hedgehog)
 * The Weasel (Garfield and Friends)
 * Dick Dastardly (Wacky Races/Dastardly and Muttley)
 * Montana Max (Tiny Toon Adventures)
 * Yosemite Sam, Elmer Fudd or Wile E. Coyote (Looney Tunes)
 * The Grinch (Dr. Seuss/The Wubbulous World of Dr. Seuss)
 * Horrid Henry (Horrid Henry)
 * Rattles (Arthur)
 * Timmy McNulty (Rugrats)
 * Roger Klotz (Doug)
 * Denzel Crocker or Jorgen (The Fairy OddParents)
 * King Goobot (Jimmy Neutron)
 * King Dedede or Meta Knight (Kirby)
 * Mewtwo or Meowth (Pokemon)
 * Charles Montgomery Burns (The Simpsons)
 * Stewie Griffin (Family Guy)
 * Terrence (Foster's Home for Imaginary Friends)
 * Dr. Heinz Doofenshmirtz (Phineas and Ferb)
 * Pete (Mickey Mouse)
 * Nasty Jack (Winnie the Pooh)
 * King Candy/Turbo (Wreck-it Ralph)
 * Sean (The Alliance and Gripps Group Show)
 * Mr. Robinson or The Robber (The Amazing World of Gumball)
 * Chris Mclean, Duncan or Ezekiel (Total Drama)
 * Destroyer of Worlds or The Night Owl (Regular Show)
 * Ice King (Adventure Time)
 * Mattia Focacci, Alberto Arata or Stefano Morchio (Niki Cassulo)
 * Hacker (Cyberchase)
 * Eddy's Brother or Kevin (Ed, Edd 'n' Eddy)
 * Eric Cartman or Scott Tenorman (South Park)
 * Sid (Toy Story)
 * Randall (Monsters Inc.)
 * Mojo Jojo (The Powerpuff Girls)
 * Vector (Despicable Me)
 * Carlos (Hop)
 * Hacker (Cyberchase)