Casey Kasem
Shaggy Rogers (voice) (archive footage)
Frank Welker
Scooby-Doo / Fred Jones (voice) (archive footage)
Mindy Cohn
Velma Dinkley (voice) (archive footage)
Grey DeLisle
Daphne Blake / Dempsey (voice) (archive footage)
Mark Hamill
Emperor Caesar Saladicus (voice) (archive footage)
Daran Norris
Ugo DiRinaldi / Shopkeeper / Zombie (voice) (archive footage)
Tara Strong
Alexandra Viggi (voice) (archive footage)
Nika Futterman
Rutie Banez (voice) (archive footage)
Pat Fraley
Uncle Karl (voice) (archive footage)
Dee Bradley Baker
Crusty McPeet / Keeper (voice) (archive footage)