Sheldon Plankton (NES)

Sheldon J. Plankton (more commonly known as just Plankton) is Mr. Krab's arch-enemy and business rival who is always trying to steal the secret Krabby Patty secret formula. At some point in NES Chapter 1 Part 12, Plankton passed away and was replaced by his son, Shelby Plankton, although he was revived at some point. In Chapter 3 Part 5, Plankton was killed again by a fire tire and was replaced by his great-great-great-great-great-great-great-great-great-great-great-great-great-great grandson Sheldon J. Plankton XVII. In Chapter 3 Part 15, it is revealed that Plankton was resurrected a few weeks ago.