Casey Kasem

Character: Shaggy (archive footage) (uncredited)

Sandy Duncan

Character: Self

Davy Jones

Character: Self

Tim Conway

Character: Self

Phyllis Diller

Character: Self

Jonathan Lipnicki

Character: Self

Tom Kenny

Character: Mayor of Townsville - Top Cat (voice)

Jeff Bennett

Character: Johnny Bravo (voice)

Ron McClary

Character: Captain Linger (voice)

Don Knotts

Character: Self

Jonathan Winters

Character: Self

Robin Williams

Character: Self

Marsha Crenshaw

Character: Announcer (voice)

Arthur Anderson

Character: Eustace Bain (voice)

Doug Preis

Character: Thundarr the Barbarian (voice)

Janet Waldo

Character: Judy Jetson (voice)

Thea White

Character: Muriel Bain (voice)

B.J. Ward

Character: Betty Rubble (voice)

Jennifer Martin

Character: Miss Sara Bellum (voice)

Charlie Adler

Character: Big Red Guy - Chicken (voice)

Grey DeLisle

Character: Daphne Blake (voice)

Caroline Sellers

Character: Wilma Flintstone (Young) (voice)

B.J. Mitchell

Character: Barney Rubble (Young) (voice)

Tom Kane

Character: Professor Utonium - Him (voice)

Brenda Vaccaro

Character: Bunny Bravo (voice)

Jeff Bergman

Character: Porky Pig - Fred Flintstone / Foghorn Leghorn / Elmer Fudd (voice)

Debbie Allen

Character: Self (uncredited)

Christina Augustinos

Character: Producer (uncredited)

David-Paul Grove

Character: Johnny 2x4 (voice) (archive footage) (uncredited)

Kathleen Barr

Character: Kevin (voice) (archive footage) (uncredited)

Mel Blanc

Character: Bugs Bunny (voice) (archive footage) (uncredited)

Christine Cavanaugh

Character: Dexter (voice) (archive footage) (uncredited)

Keenan Christensen

Character: Jimmy (voice) (archive footage) (uncredited)

Kat Cressida

Character: Dee-Dee (voice) (archive footage) (uncredited)

Eddie Deezen

Character: Mandark (voice) (archive footage) (uncredited)

Patrick Ewing

Character: Self (uncredited)

William Hanna

Character: Self (archive footage) (uncredited)

Matt Hill

Character: Ed (voice) (archive footage) (uncredited)

Scott Innes

Character: Scooby-Doo (voice) (uncredited)

Janyse Jaud

Character: Sarah (voice) (archive footage) (uncredited)

Chuck Jones

Character: Self (archive footage) (uncredited)

Peter Kelamis

Character: Rolf (voice) (archive footage) (uncredited)

Chris Kirkpatrick

Character: Self (uncredited)

Don Messick

Character: Scooby-Doo (voice) (archive footage) (uncredited)

Tony Sampson

Character: Eddy (voice) (archive footage) (uncredited)

Sam Vincent

Character: Edd (voice) (archive footage) (uncredited)

Frank Welker

Character: Fred Jones (voice) (archive footage) (uncredited)