Fred
Daphne
Shaggy
Velma
Scooby Voice (voice)
Mondavarious
Mary Jane
Voodoo Maestro
N' Goo Tuana
Sugar Ray
Zarkos
Velma's Friend
Brad
Old Man Smithers
Scrappy Voice (voice)
Scrappy Rex Voice (voice)
Tiny Henchman
Reporter #1
Reporter #2
Island Emissary
Bartender Dead Mike's
Guy in the Vat
Carol
Training Video Woman
Training Video Guy #1
Training Video Guy #2
Melvin Doo
Co-Ed
Fitzgibbon
Coast Guard #2
Airport Attendant
Airport Family
Spooky Hotel Bartender
Co-Ed Hottie
Autograph Seeker
Cavern Henchman
Henchman #1
Henchman #2
Creature Voices (voice)
Pamela Anderson (uncredited)