Shaggy Rogers (voice) (archive footage)

Casey Kasem

Scooby-Doo / Fred Jones (voice) (archive footage)

Frank Welker

Julian Libris (voice) (archive footage)

Kevin McDonald

Ryan Sheckler (voice) (archive footage)

Ryan Sheckler

Additional Voices (voice) (archive footage)

Maurice LaMarche

Velma Dinkley (voice) (archive footage)

Mindy Cohn

Daphne Blake / Dempsey (voice) (archive footage)

Grey DeLisle

Emperor Caesar Saladicus (voice) (archive footage)

Mark Hamill

Ugo DiRinaldi / Shopkeeper / Zombie (voice) (archive footage)

Daran Norris

Alexandra Viggi (voice) (archive footage)

Tara Strong

Rutie Banez (voice) (archive footage)

Nika Futterman

Uncle Karl (voice) (archive footage)

Pat Fraley

Crusty McPeet / Keeper (voice) (archive footage)

Dee Bradley Baker