Cast
- Kenny Redman as Scooby Doo
- Carl Simmons as Shaggy Rogers
- David Thompson as Fred Jones
- Ann Darrow as Daphne Blake
- Hilda (from Son of Kong (2013) and Kenny and the Lost World 2) as Velma Dinkley
- Hunter D. Smith as Patrick Wisley
- D'Leh (from 10,000 BC (2008)) as Jeremiah ''Old Man'' Wickles
- Apatosaurus (underwater Carnivore) as Evil-Masked Figure
- Kong as Black Knight Ghost
- V-Rex/T-Rex as The Black Knight Ghost's Horse
- 2 Triceratops as Skeleton Men
- Spinosaurus as Miner 49er
- Dilophosaurus as The Zombie
- Woolly Mammoth Bull (One) as 10,000 Volt Ghost
- Ferrucutus as Tar Monster
- The Skull Island Witch Doctor as The Cotton Candy Glob
- Pterandon as The Pterodactyl Ghost (both are flying reptiles)