If you loved 3 Ninjas Kick Back, try Gamera vs. Jiger
A bridge between a film you've already seen and one most people haven't. Gamera vs. Jiger has roughly 4.6× fewer votes than 3 Ninjas Kick Back — it's a deeper cut, not a mainstream recommendation. Here's what they share, and what the second one does that the first one doesn't.
What they share
Theysit in Action / Adventure / Family territory. If that's the register that drew you to 3 Ninjas Kick Back, the second film will land in a comparable space — through a different lens.
What Gamera vs. Jiger is
A family-friendly monster mash for the discerning giant-turtle fan. Jiger arrives in Japan after some meddling with a Wester Island statue. Gamera takes on this new foe, but ends up needing a submarine extraction performed by two precocious children. Mission accomplished, sort of.

