Sander Schwartz Creator, Executive Producer Frank Welker Fred Jones, Scooby-Doo Voice Casey Kasem Norville "Shaggy" Rogers Voice Mindy Cohn Velma Dinkley Voice Grey DeLisle Daphne Blake Voice Irene Bedard Cody Long Guest Voice Michael Horse Leon Strongfeather Guest Voice Phil LaMarr Col. Henry Thomwald, Shaman Guest Voice Rob Paulsen Avery Orenthal, Government Agent Guest Voice Joseph Barbera Executive Producer Ed Scharlach Writer Tim Maltby Director