Sheldon J. Plankton is Mr. Krabs's rival and an evil microscopic sea creature who is both a genius and retarded. He is the manager of the appalling Chum Bucket. He has always made epic fails to get the Krabby Patty Secret Formula, creating his own criminal record. He is currently after the Steak 'N' Shake Secret Formula.
The Rise of Sqeegee 4[]
Plankton's appearance in this episode is very brief, as he quickly gets killed by Dark Sqeegee. Mr. Krabs notices and cheers, only to be targeted by Sqeegee later.
The Rise of Sqeegee 5[]
Plankton was plotting to rule the world, and he wanted to use Sqeegee as a catalyst, so he used his revival tube to regenerate Sqeegee's body and revive him at full power, unintentionally splitting Super Sqeegee and Dark Sqeegee. He got squashed by Sqeegee though. Later, he made Robo Sqeegee, which just blew up, and then he made Robot Sqeegee which also failed because it was destroyed byThe King. Plankton was eventually killed by the Sqeegee's stare when Sqeegee returned to the Chum Bucket.
The Rise of Sqeegee 6[]
Plankton, just like in the Rise of Sqeegee 4, got killed off quickly by Fire Sqeegee.
The Rise of Sqeegee 8[]
Plankton attempted to build Cyborg Sqeegee in this episode, with plans of overthrowing Sqeegee's reign, but he had unknowingly forgotten to program it not to kill him, so he was instantly incinerated as Cyborg Sqeegee left to wreak havoc across Bikini Bottom.
The Rise of Weegee[]
Plankton returns in The Rise of Weegee episode 4, where it is revealed that he created a new version of Cyborg Sqeegee, designed not to kill him this time. Plankton gloats about his newest plan to team up with Sqeegee, much to his computer wife's disapproval. He then sets his plan into action by flying up Squidward's butt and retrieving Sqeegee's remains from his body. He expresses interest in marrying Sqeegee, but settles for a truce to rule the world when Sqeegee very quickly rebuffs this. Plankton resurrects Sqeegee back into one piece by throwing him into a rejuvenation machine, but is soon betrayed, being reduced to ashes by him. However, Plankton is quickly revived by Karen, and manages to convince Sqeegee to join him on his conquest after impressing him with the new Cyborg Sqeegee as well as his ability to revive both Sqeegee and himself.