Frank Welker Fred, Scooby Voice Mindy Cohn Velma Voice Grey DeLisle Daphne Voice Matthew Lillard Shaggy Voice Dave Allen Rick Yantz, Announcer, Hospital PA Guest Voice Gary Cole Mayor Fred Jones Sr. Guest Voice Joe Holt Hugh Dederdee Guest Voice Richard McGonagle Ed Machine, Announcer, Creepy Voice Guest Voice Marion Ross Grandma Moonbeam Guest Voice Paul Rugg Kelsepsian, Jingle Singer, Hairy Sasquach Guest Voice Patrick Warburton Sheriff Bronson Stone, Clown Guest Voice Sam Register Executive Producer Spike Brandt Producer Tony Cervone Producer Curt Geda Director Victor Cook Director Mitch Watson Writer Derrick Wyatt Writer