Flim-Flam (from Top 13 Ghosts of Scooby Doo) as Gumball Watterson
Scrappy-Doo (from Scooby Doo) as Darwin Watterson
Velma (from The Scooby Doo Show) as Anais Watterson
Daphne Blake (from The Scooby Doo Show) as Nicole Watterson
Fred Jones (from The Scooby Doo Show) as Richard Watterson
Pebbles (from The Flintstones) as Penny Fizgerald
The Announcer as Principle Brown
Blubbler Bear as Rocky
Rufus Ruffnut as Mr. Small
Sgt. Blast as The Donut Sheriff