Frank Welker Fred, Scooby Voice Mindy Cohn Velma Voice Grey DeLisle Daphne Voice Matthew Lillard Shaggy Voice Lewis Black Mr. E Guest Voice Gary Cole Mayor Fred Jones Sr., Motorcycle Cop Guest Voice John O'Hurley Skipper Shelton Guest Voice Kath Soucie Nan Blake Guest Voice Patrick Warburton Sheriff Bronson Stone Guest Voice Vivica A. Fox Angel Dynamite Guest Voice James Arnold Taylor George Avocados, Rung Ladderton, Teen Driver Guest Voice Sam Register Executive Producer Spike Brandt Producer Tony Cervone Producer Victor Cook Director Mitch Watson Writer Michelle Lamoreaux Writer Robert Lamoreaux Writer