The gang goes on a trip to check on Velma's younger sister, Madelyn. She's been studying stage magic at the Whirlen Merlin Magic Academy, where apparently there have been sightings of a giant griffin. The gang decides to investigate.
Frank Welker
as Scooby-Doo / Fred Jones (voice)
Matthew Lillard
as Shaggy Rogers (voice)
Mindy Cohn
as Velma Dinkley (voice)
Grey DeLisle
as Daphne Blake (voice)
Danica McKellar
as Madelyn Dinkley (voice)
James Patrick Stuart
as Whirlen Merlin (voice)
Crystal Scales
as Crystal (voice)
Brian Posehn
as Marlon Whirlen (voice)
Jeffrey Tambor
as Mr. Calvin Curdles (voice)
Diane Delano
as Mrs. Alma Rumblebuns (voice)
John DiMaggio
as Groundskeeper Amos (voice)
Melique Berger
as Upset Mother (voice)
