Pokémon Ranger and the Temple of the Sea

Ash, Pikachu, and friends encounter a Pokémon Ranger named Jackie and travel with him to the Sea Temple to protect the mythical Pokémon Manaphy. They must navigate through challenges and face off against pirate treasure hunters to safeguard the Sea Temple and Manaphy's power. The story revolves around friendship, teamwork, and the bond between Pokémon and humans.