If you loved Not Quite Dead Yet, try Gamera vs. Jiger
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 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.

