Riven

Casey Kasem

as Shaggy (archive footage) (uncredited)

Sandy Duncan

as Self

Davy Jones

as Self

Tim Conway

as Self

Phyllis Diller

as Self

Jonathan Lipnicki

as Self

Tom Kenny

as Mayor of Townsville - Top Cat (voice)

Jeff Bennett

as Johnny Bravo (voice)

Ron McClary

as Captain Linger (voice)

Don Knotts

as Self

Jonathan Winters

as Self

Robin Williams

as Self

Marsha Crenshaw

as Announcer (voice)

Arthur Anderson

as Eustace Bain (voice)

Doug Preis

as Thundarr the Barbarian (voice)

Janet Waldo

as Judy Jetson (voice)

Thea White

as Muriel Bain (voice)

B.J. Ward

as Betty Rubble (voice)

Jennifer Martin

as Miss Sara Bellum (voice)

Charlie Adler

as Big Red Guy - Chicken (voice)

Grey DeLisle

as Daphne Blake (voice)

Caroline Sellers

as Wilma Flintstone (Young) (voice)

B.J. Mitchell

as Barney Rubble (Young) (voice)

Tom Kane

as Professor Utonium - Him (voice)

Brenda Vaccaro

as Bunny Bravo (voice)

Jeff Bergman

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

Debbie Allen

as Self (uncredited)

Christina Augustinos

as Producer (uncredited)

David-Paul Grove

as Johnny 2x4 (voice) (archive footage) (uncredited)

Kathleen Barr

as Kevin (voice) (archive footage) (uncredited)

Mel Blanc

as Bugs Bunny (voice) (archive footage) (uncredited)

Christine Cavanaugh

as Dexter (voice) (archive footage) (uncredited)

Keenan Christensen

as Jimmy (voice) (archive footage) (uncredited)

Kat Cressida

as Dee-Dee (voice) (archive footage) (uncredited)

Eddie Deezen

as Mandark (voice) (archive footage) (uncredited)

Patrick Ewing

as Self (uncredited)

William Hanna

as Self (archive footage) (uncredited)

Matt Hill

as Ed (voice) (archive footage) (uncredited)

Scott Innes

as Scooby-Doo (voice) (uncredited)

Janyse Jaud

as Sarah (voice) (archive footage) (uncredited)

Chuck Jones

as Self (archive footage) (uncredited)

Peter Kelamis

as Rolf (voice) (archive footage) (uncredited)

Chris Kirkpatrick

as Self (uncredited)

Don Messick

as Scooby-Doo (voice) (archive footage) (uncredited)

Tony Sampson

as Eddy (voice) (archive footage) (uncredited)

Sam Vincent

as Edd (voice) (archive footage) (uncredited)

Frank Welker

as 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