If you loved Scooby-Doo! and the Monster of Mexico, try Scooby-Doo! and the Legend of the Vampire
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.
You already loved

Scooby-Doo! and the Monster of Mexico
→
Try this next

Scooby-Doo! and the Legend of the Vampire
What they share
Both films are directed by Scott Jeralds, and they both carry the cozy, playful mood tags, and they sit in Animation / Comedy / Family / Mystery territory. If that's the register that drew you to Scooby-Doo! and the Monster of Mexico, the second film will land in a comparable space — through a different lens.
cozyplayful
What Scooby-Doo! and the Legend of the Vampire is
Vampire Rock, Australia. Midsummer. Didgeridoo drone. The Mystery Inc. crew attends a rock concert, only to witness a monstrous Yowie Yahoo abscond with the bands. Better Scooby-Doo than Twilight Zone Down Under.