Cast principale
Frank Welker
Scooby-Doo / Fred Jones / Motoshondu (voice) (archive footage)
Casey Kasem
Shaggy Rogers (voice) (archive footage)
Grey DeLisle
Daphne Blake / Shawna (voice) (archive footage)
Mindy Cohn
Velma Dinkley (voice) (archive footage)
Jeff Bennett
Crunchy Granville / Fritz / Mr. Keenan (voice) (archive footage)
Mimi Rogers
Maura Ravenmane / Helga (voice) (archive footage)
Kevin Michael Richardson
Sharky Tazo / Stink Eye (voice) (archive footage)
John Stephenson
Zelig (voice) (archive footage)