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Reginald "Skull" Skulinski is a character in the 2006 film Monster House.
Skull is a nickname given to him by D. J. Walters and Chowder. They, along with Jenny Bennett, consult his apparent expertise on the supernatural given he is the smartest person they know.
Skull is an expert and is obsessive over video games and comic books. He once played a game for 4 days on one quarter, a gallon of chocolate milk and an adult diaper.