Pokemon The Movie 11: Giratina and the Sky Warrior

Pokémon The Movie 11: Giratina and the Sky Warrior revolves around the encounter between the legendary Renegade Pokémon Giratina and the Temporal Pokémon Dialga near a lake. Giratina successfully drags Dialga into its alternate dimension home, but a small green Pokémon, Shaymin, inadvertently gets caught in the process. Shaymin escapes and ends up at the Pokémon Center, where it is treated and identified as the mythical Gratitude Pokémon.