Pokémon: Giratina and the Sky Warrior (劇場版ポケットモンスター ダイヤモンド&パール ギラティナと氷空（そら）の花束 シェイミ) 15 years old

In a Reverse World, a Legendary battle rages on...

When Giratina is discovered to be able to create parallel dimensions, it's up to Ash and his friends to stop a mysterious stranger from using its powers for evil.