Plankton

Character name is...Sheldon J. Plankton

Plankton's whole life revolves around stealing the Krabby Patty formula.

Biography
He went to college.

He comes from a very large, somewhat hillbilly family. He built a sentient computer, Karen, and then married her. He was friends with Krabs as a kid and came from a similar near-poverty level background, often being made fun of for it.

Behind the scenes
If there's anything you'd like to say that's not derived from episodes, but maybe comes from interviews that actors or crew gave, use this section.