Pokemon Movie 04: Celebi Toki wo Koeta Deai

Celebi, a mythical Pokémon able to travel through time, is pursued by a poacher in a forest 40 years in the past. A young trainer named Yukinari tries to protect it, and Celebi uses its power to escape, carrying both of them into the future where they encounter Ash, Pikachu, Misty, and Brock.

The danger has followed them across time. Team Rocket’s ruthless Iron-Masked Marauder wants Celebi for himself and uses Dark Balls capable of corrupting captured Pokémon and forcing out their strength. Ash and Yukinari must protect Celebi from becoming his weapon while helping the frightened Pokémon recover from the pursuit that has already crossed decades.