| 
        Casey Kasem
       | 
      Shaggy (archive footage) (uncredited) | 
    
    
    
      | 
        Sandy Duncan
       | 
      Herself | 
    
    
    
      | 
        Davy Jones
       | 
      Himself | 
    
    
    
      | 
        Tim Conway
       | 
      Himself | 
    
    
    
      | 
        Phyllis Diller
       | 
      Herself | 
    
    
    
      | 
        Jonathan Lipnicki
       | 
      Himself | 
    
    
    
      | 
        Tom Kenny
       | 
      Mayor of Townsville / Top Cat (voice) | 
    
    
    
      | 
        Jeff Bennett
       | 
      Johnny Bravo (voice) (as Jeff Glen Bennett) | 
    
    
    
      | 
        Ron McClary
       | 
      Captain Linger (voice) | 
    
    
    
      | 
        Don Knotts
       | 
      Himself | 
    
    
    
      | 
        Jonathan Winters
       | 
      Himself | 
    
    
    
      | 
        Robin Williams
       | 
      Himself | 
    
    
    
      | 
        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) (as BJ Ward) | 
    
    
    
      | 
        Jennifer Martin
       | 
      Miss Sara Bellum (voice) | 
    
    
    
      | 
        Charlie Adler
       | 
      Big Red Guy / Chicken (voice) (as Charles Adler) | 
    
    
    
      | 
        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
       | 
      Herself (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
       | 
      Himself (uncredited) | 
    
    
    
      | 
        William Hanna
       | 
      Himself (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
       | 
      Himself (archive footage) (uncredited) | 
    
    
    
      | 
        Peter Kelamis
       | 
      Rolf (voice) (archive footage) (uncredited) | 
    
    
    
      | 
        Chris Kirkpatrick
       | 
      Himself (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) |