The 13 Ghosts of Scooby-Doo (1985)

Scooby and Shaggy are tricked by ghosts Bogle and Wierd into opening a chest of demons. With the aide of Daphne, Scrappy, an orphan named Flim Flam and warlock Vincent Van Ghoul, they have to return the 13 demons to the chest.

The 13 Ghosts of Scooby-Doo is an animation show featuring Don Messick and created by Tom Ruegger.

The 13 Ghosts of Scooby-Doo is currently streaming for free (ad-supported) on Tubi TV and it's also available on Boomerang and Boomerang Amazon Channel.

It is also possible to buy The 13 Ghosts of Scooby-Doo on Amazon Video, Apple TV and Vudu.