Professor E. Gadd is a professor who studies ghosts and helps provide Luigi, Jesse and Xion with the equipment for fighting ghosts.
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Trivia[]
- Professor E. Gadd will guest star in Jeffrey, Jaden & Friends join the Ghostbusters.
- Professor E. Gadd will return in Jesse, Xion & Luigi's Mansion: Dark Moon.
- Professor E. Gadd had also created F.L.U.D.D.
- Professor E. Gadd is recruited by Dogbert to serve as the chief researcher for The Rogues. He lives part-time in a small lab aboard the Liver of Iron.