If you loved Zatch Bell! Attack of Mechavulcan, try Naruto: The Lost Story - Mission: Protect the Waterfall Village!
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

Zatch Bell! Attack of Mechavulcan
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Naruto: The Lost Story - Mission: Protect the Waterfall Village!
What they share
Theysit in Action / Adventure / Animation territory. If that's the register that drew you to Zatch Bell! Attack of Mechavulcan, the second film will land in a comparable space — through a different lens.
What Naruto: The Lost Story - Mission: Protect the Waterfall Village! is
You're a ninja, tracking thieves who've raided sacred springs. But a rival squad complicates your mission. Date's direction keeps the focus tight. What remains is a question: can loyalty overcome duty?