On screen
Cast
18 credited performers
Don Messick
Announcer / Boo Boo Bear / Scooby-Doo / Mr. Creeply (voice)
Daws Butler
Snagglepuss / Yogi Bear / Quick Draw McGraw / Various (voice)
John Stephenson
Mildew Wolf / Dread Baron / Great Fondoo / Doggie Daddy (voice)
Casey Kasem
Shaggy Rogers (voice)
Scatman Crothers
Hong Kong Phooey (voice)
Frank Welker
Dynomutt / Jabberjaw / Magic Rabbit / Sooey Pig (voice)
Mel Blanc
Barney Rubble / Captain Caveman / Speed Buggy (voice)
Julie Bennett
Cindy Bear (voice)
Marilyn Schreffler
Brenda Chance / Daisy Mayhem (voice)
Vernee Watson
Dee Dee Skyes (voice)
Laurel Page
Character not listed
Heather North
(voices)
Alan Reed
Character not listed
Gary Owens
Character not listed
Bob Holt
Character not listed
Joe Besser
Character not listed
Doug Young
Character not listed
Julie McWhirter
Character not listed