Summary
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.
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Cast
Frank Welker
Scooby-Doo / Fred Jones (voice)
Matthew Lillard
Shaggy Rogers (voice)
Mindy Cohn
Velma Dinkley (voice)
Grey DeLisle
Daphne Blake (voice)
Danica McKellar
Madelyn Dinkley (voice)
James Patrick Stuart
Whirlen Merlin (voice)
Crystal Scales
Crystal (voice)
Brian Posehn
Marlon Whirlen (voice)
Jeffrey Tambor
Mr. Calvin Curdles (voice)
Diane Delano
Mrs. Alma Rumblebuns (voice)
John DiMaggio
Groundskeeper Amos (voice)
John Stephenson
The Sheriff (voice)
Dee Bradley Baker
Sherman (voice)
Olivia Hack
Treena (voice)
Dave Attell
GPS (voice)