Frank Welker Fred, Scooby Voice Mindy Cohn Velma Voice Grey DeLisle Daphne Voice Matthew Lillard Shaggy Voice Carlos Alazraqui Ernesto Guest Voice Tia Carrere Amy Guest Voice Frances Conroy Angie Dinkley Guest Voice Vivica A. Fox Angel Dynamite Guest Voice Daran Norris Skipper's Brother Guest Voice John O'Hurley Skipper Shelton Guest Voice Gary Anthony Williams Dr. Cavanaugh Guest Voice Sam Register Executive Producer Spike Brandt Producer Tony Cervone Producer Curt Geda Director Lauren Montgomery Director Roger Eschbacher Writer