If you loved Pikachu & Pichu, try Pokémon: Pikachu's Rescue Adventure
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
Both films are directed by Kunihiko Yuyama, and they both carry the playful mood tag, and they sit in Adventure / Animation / Family territory. If that's the register that drew you to Pikachu & Pichu, the second film will land in a comparable space — through a different lens.
playful
What Pokémon: Pikachu's Rescue Adventure is
A plucky gang of pocket monsters stumbles into a hidden valley where the real adventure arrives via Diglett express. After fetching a stray Togepi they inadvertently trigger an Exeggcute custody battle only to be strafed by a biblical gust of teenage weather. Eight-year-olds cheered; parents sighed.

