If you loved Gamera: Super Monster, try Gamera vs. Guiron
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.
What they share
Both films are directed by Noriaki Yuasa, and they both carry the playful mood tag, and they sit in Action / Family / Science Fiction territory. If that's the register that drew you to Gamera: Super Monster, the second film will land in a comparable space — through a different lens.
playful
What Gamera vs. Guiron is
Two kids stow away on a spaceship and get shunted to a planet full of alien salad days gone grotesquely wrong. Gamera jets in to babysit while a crustacean buzzsaw monster tries to mince their brains. The whole thing feels like snack-time left unsupervised.

