Frank Welker Fred, Scooby Voice Mindy Cohn Velma Voice Grey DeLisle Daphne Voice Matthew Lillard Shaggy Voice Isabella Acres Mary-Ann Geerdon Guest Voice Carlos Alazraqui Krampus, Punk Kid Guest Voice Lewis Black Mr. E Guest Voice Tia Carrere Judy Reeves Guest Voice Udo Kier Professor Pericles Guest Voice Tim Matheson Brad Chiles Guest Voice Kate Higgins Mayor Janet Nettles Guest Voice Patrick Warburton Sheriff Bronson Stone Guest Voice Sam Register Executive Producer Spike Brandt Producer Tony Cervone Producer Curt Geda Director Lauren Montgomery Director Michael Ryan Writer