Pokemon Movie 11: Giratina to Sora no Hanataba Shaymin

Synopsis

After winding up in the middle of the battle between Giratina and Dialga, Shaymin somehow reached the place where Satoshi (Ash) and his friends are taking a break...But with the battle going on in the Torn World, also known as the Reverse World, they somehow got involved, leading to a more complicated case than they ever imagined...