If you loved Mazinger Z vs The Great Dark General, try Gunbuster: The Movie
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
Theyboth carry the playful mood tag, and they sit in Action / Adventure / Animation territory. If that's the register that drew you to Mazinger Z vs The Great Dark General, the second film will land in a comparable space — through a different lens.
What Gunbuster: The Movie is
You aspire to pilot a space fighter, just like your late father. You enroll in a training program, but your skills lag behind the other cadets. Then, you're inexplicably chosen to co-pilot an experimental mecha. Anno's debut short-form anime is a frenetic, sentimental tribute to hot-blooded sports stories. The animation style has aged, but the core of its drama remains.

