Frank Welker as Scooby-Doo / Fred Jones (voice) (archive footage)

Mindy Cohn as Velma Dinkley (voice) (archive footage)

Grey DeLisle as Daphne Blake (voice) (archive footage)

Casey Kasem as Shaggy Rogers (voice) (archive footage)

Don Messick as Scooby-Doo (voice) (archive footage)

Nicole Jaffe as Velma Dinkley (voice) (archive footage)

Indira Stefanianna as Daphne Blake (voice) (archive footage)

Jennifer Hale as Leora Lasswell (voice) (archive footage)

Jean Vander Pyl as Sarah Jenkins (voice) (archive footage)

James Arnold Taylor as Burr Batson / Champ Truman (voice) (archive footage)

Eddie Deezen as Gibby Norton (voice) (archive footage)

James Horan as Dr. Fleg / Bandit (voice) (archive footage)

Fred Tatasciore as Skeleton (voice) (archive footage)

John DiMaggio as Mike Fury (voice) (archive footage)

Frankie Ryan Manríquez as Jimmy (voice) (archive footage)

Victoria Bruno as Cindy (voice) (archive footage)

Rodger Bumpass as Announcer / Steve (voice) (archive footage)

Hal Smith as (voice) (archive footage)

Vic Perrin as (voice) (archive footage)

John Stephenson as (voice) (archive footage)