Sheldon J. Plankton is the main antagonist of the SpongeBob SquarePants franchise created by Nickelodeon. He is the founder and co-owner of the Chum Bucket restaurant, and the arch-nemesis of both Mr. Krabs (his former best friend turned business rival) and SpongeBob SquarePants (the show's titular character). His goal in life is to steal the Krabby Patty secret formula to not only make his.. Why is Plankton a villain? Plankton is shown to be an evil mastermind through and through, with signs of having a napoleonic complex due to his very short stature. His plans always involve technological devices and weapons, all for the sake of the formula. Although sometimes, he merely wants to expand his business or ruin the Krusty Krab.
Plankton works with the help of his sidekick/wife, Karen, a sentient computer who gives him most of his evil plans. He is a planktonic copepod and the business rival of Mr. Krabs, the owner of the Krusty Krab where SpongeBob SquarePants works.. And perhaps more amusingly, given his constant "evil" schemes, are real-life plankton truly as nefarious or destructive as Bikini Bottom's notorious mini-menace? We're about to dive deep and unmask the truth behind this captivating cartoon character and his real-world namesake.