Ensemble
Frank Welker
Freddie Jones / Scooby-Doo (voice)
Mindy Cohn
Velma Dinkley (voice)
Grey DeLisle
Daphne Blake (voice)
Matthew Lillard
Shaggy Rogers (voice)
Robin Atkin Downes
Fortius / Announcer (voice)
Troy Baker
Sergey Plotnikov (voice)
Josh Keaton
Steve Looker (voice)
Janet Montgomery
Diane (voice)
James Patrick Stuart
Jack Riggins / Igor (voice)
Domitilla D'Amico
Daphne Blake (uncredited)