Dark Humor on Instagram: "SpongeBob SquarePants features Sheldon J. Plankton, the diminutive but diabolically ambitious genius who runs the failing Chum Bucket restaurant. As the series’ primary antagonist, Plankton’s entire existence is defined by his obsessive quest to steal the secret Krabby Patty formula from his business rival and former best friend, Mr. Krabs. Despite his high IQ and a laboratory filled with advanced technology—including his cynical computer wife, Karen—his elaborate schem