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- Happy Halloween, Scooby-Doo!Multi source
Synopsis
Scooby-Doo and the gang team up with their pals, Bill Nye The Science Guy and Elvira Mistress of the Dark, to solve this mystery of gigantic proportions and save Crystal Cove! 
Original title Happy Halloween, Scooby-Doo!
IMDb Rating 6.2 1,643 votes
TMDb Rating 7.924 198 votes
Director
Director
Cast
Daphne Blake (voice)
Michelle (Voice)
Shaggy Rogers (voice)
Scooby-Doo / Fred Jones (voice)
Elvira (voice)
Bill Nye (voice)
Velma Dinkley (voice)
Mike (Voice)
Alpha Jackal Lantern / Federal Agent Malarkey (Voice)
Autopilot / Parent (Voice)
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