Shelby Plankton

Sheldon J. "Shelby" Plankton Jr. was an evil sorcerer form 4017 and the son of Plankton. Shelby is gray in color, with two long arms and clawed hands. He notably lacked legs, could change the number and size of his eye, and wore a green rabbit-eared hat to hide his antennae. Shelby was about to make everyone his slaves, but SpongeBuck thwarted him. He died in Part 13 of a meme overdose thanks to Thomas the Dank Engine.