Casey Kasem
(voices)
Elizabeth Daily
Buttercup (Voice)
Mae Whitman
Little Suzy (Voice)
Tara Strong
Bubbles (Voice)
Jeff Bennett
Jhonny Bravo (Voice)
Cathy Cavadini
Blossom (Voice)
Christine Cavanaugh
Dexter (Voice)
Charlie Adler
I.R. Baboon (Voice) / Cow (Voice) / Chicken (Voice) / Red Guy (Voice)
Richard Steven Horvitz
Billy (Voice)
Grey DeLisle
Mandy (Voice)
Brenda Vaccaro
Bunny Bravo (Voice)
Greg Eagles
The Grim Reaper (Voice)
Tom Kane
Professor Utonium (Voice)
Tom Kenny
The Mayor (Voice)
Charlie Adler
I.R. Baboon
Michael Dorn
I.M. Weasel (Voice)
Marty Grabstein
Courage (Voice)
Thea White
Muriel Bagge
Thea White
Muriel Bagge (Voice)
Frank Welker
(voices)
Mindy Cohn
(voice)
Jim Cummings
(voice)
Mark Hamill
(voices)
William Hanna
(voice)
Joseph Barbera
(voice)
Ted Turner
(archive footage)
Don Messick
(archive footage)
Allison Moore
Dee Dee (voice)
