William William Bo William Banana Fana Fo Filly Plankton, more commonly known as Billy Billy Bo Billy Banana Fana Fo Filly, is one of Sheldon J. Plankton's cousins. His only appearance is in the episode is "Plankton's Army."


He is taller than Plankton. He is a hillbilly, like the rest of Plankton's cousins.


  • His name is a reference to "Name Game."

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