Billy is the inventor of Finn's team in Finn 10: Fusion. He was mutated into a To'kustars. He can switch between one and himself. He is dating Carly.

He is really awesome !


  • Moutater: An invention that mutates anything. It mutated him, Carly, Tom, and Finder.
  • Brain Swapper: It can switch any two brains as long as the two people are focused and concentrating.
  • Sleep Ball: A ball with a blaster on it. It makes anything go to sleep.
  • The Heal: A machine that can heal anything. It messes up and spreads the disease to someone else.
  • Animation Contraption: A machine that brings anything to life.[[]]
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