If you loved Legend of Crystania: The Motion Picture, try Lupin the Third: The Hemingway Papers
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

Legend of Crystania: The Motion Picture
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Lupin the Third: The Hemingway Papers
What they share
Theysit in Action / Animation territory. If that's the register that drew you to Legend of Crystania: The Motion Picture, the second film will land in a comparable space — through a different lens.
What Lupin the Third: The Hemingway Papers is
Here's an animated adventure that is exactly as plausible as its title. Lupin seeks out papers written by Ernest Hemingway, which contain the location of some treasure. It's a shame the great man's name is attached, but at least the explosions are good.