Casey Kasem
(Shaggy (archive footage) (uncredited))
Sandy Duncan
(Self)
Davy Jones
(Self)
Tim Conway
(Self)
Phyllis Diller
(Self)
Jonathan Lipnicki
(Self)
Tom Kenny
(Mayor of Townsville - Top Cat (voice))
Jeff Bennett
(Johnny Bravo (voice))
Ron McClary
(Captain Linger (voice))
Don Knotts
(Self)
Jonathan Winters
(Self)
Robin Williams
(Self)
Marsha Crenshaw
(Announcer (voice))
Arthur Anderson
(Eustace Bain (voice))
Doug Preis
(Thundarr the Barbarian (voice))
Janet Waldo
(Judy Jetson (voice))
Thea White
(Muriel Bain (voice))
B.J. Ward
(Betty Rubble (voice))
Jennifer Martin
(Miss Sara Bellum (voice))
Charlie Adler
(Big Red Guy - Chicken (voice))
Grey DeLisle
(Daphne Blake (voice))
Caroline Sellers
(Wilma Flintstone (Young) (voice))
B.J. Mitchell
(Barney Rubble (Young) (voice))
Tom Kane
(Professor Utonium - Him (voice))
Brenda Vaccaro
(Bunny Bravo (voice))
Jeff Bergman
(Porky Pig - Fred Flintstone / Foghorn Leghorn / Elmer Fudd (voice))
Debbie Allen
(Self (uncredited))
Christina Augustinos
(Producer (uncredited))
David-Paul Grove
(Johnny 2x4 (voice) (archive footage) (uncredited))
Kathleen Barr
(Kevin (voice) (archive footage) (uncredited))
Mel Blanc
(Bugs Bunny (voice) (archive footage) (uncredited))
Christine Cavanaugh
(Dexter (voice) (archive footage) (uncredited))
Keenan Christensen
(Jimmy (voice) (archive footage) (uncredited))
Kat Cressida
(Dee-Dee (voice) (archive footage) (uncredited))
Eddie Deezen
(Mandark (voice) (archive footage) (uncredited))
Patrick Ewing
(Self (uncredited))
William Hanna
(Self (archive footage) (uncredited))
Matt Hill
(Ed (voice) (archive footage) (uncredited))
Scott Innes
(Scooby-Doo (voice) (uncredited))
Janyse Jaud
(Sarah (voice) (archive footage) (uncredited))
Chuck Jones
(Self (archive footage) (uncredited))
Peter Kelamis
(Rolf (voice) (archive footage) (uncredited))
Chris Kirkpatrick
(Self (uncredited))
Don Messick
(Scooby-Doo (voice) (archive footage) (uncredited))
Tony Sampson
(Eddy (voice) (archive footage) (uncredited))
Sam Vincent
(Edd (voice) (archive footage) (uncredited))
Frank Welker
(Fred Jones (voice) (archive footage) (uncredited))