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-Griffin

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)