If you loved Pokémon the Movie: Hoopa and the Clash of Ages, try Pokémon: The First 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.
You already loved

Pokémon the Movie: Hoopa and the Clash of Ages
→
Try this next

Pokémon: The First Movie
What they share
Both films are directed by Kunihiko Yuyama, and they both carry the cozy, playful mood tags, and they sit in Action / Adventure / Animation / Family / Fantasy territory. If that's the register that drew you to Pokémon the Movie: Hoopa and the Clash of Ages, the second film will land in a comparable space — through a different lens.
cozyplayful
What Pokémon: The First Movie is
New York harbor at dusk, a giant screen flickers, Pokémon banners wave. Trainers and their Pokémon gather, a mysterious challenge awaits, a powerful foe emerges. This introduction to Mewtwo still lands well for kids.