Pokemon Movie 11: Giratina to Sora no Hanataba Sheimi

After Dialga and Giratina clash, the battle spills into the Reverse World, a strange dimension that mirrors and supports the ordinary world. Shaymin is accidentally caught in the conflict but manages to escape, only to meet Ash, Dawn, and Brock while searching for a way to reach a flower garden where it can join others of its kind.

The group soon learns that Giratina is still hunting for a path back to Dialga, while the ambitious researcher Zero wants to seize the Reverse World's power for himself. Protecting Shaymin draws Ash and his friends across both worlds, where the balance between dimensions is placed in danger.