After accepting an invitation from a mysterious trainer, Ash, Misty and Brock meet Mewtwo, an artificially created Pokémon who wants to do battle.

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.

While Nozomi and her friends are enjoying themselves at Princess Land, an amusement park, Coco and Nuts have been abducted into the Mirror Kingdom. At the same time, Shadow is…