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)
Steve Patrick
Producer
Stuart Hill
Writer
Matt Peccini
Producer
Stuart Hill
Producer
Steve Patrick
Writer
Matt Peccini
Writer
Ashley Kohler
Producer
William Hanna
Characters
Joseph Barbera
Characters
Joseph Barbera
Executive Producer