You are watching Happy Halloween, Scooby-Doo! the movie produced in United States of America belongs with duration 76 Min in Category Family,Animation,Mystery,Comedy,. broadcast at streamingjoy.com , by [ Warner Bros. Animation ] 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!.