Ash and his friends meet up with a feisty Pokemon named Shaymin. While attempting to reunite with its friends, Shaymin stumbles upon a titanic battle between Giratma and Dialga. Giratina is the sole defender of the Reverse World, and it does not suffer intruders lightly! Add to the mix a helpful researcher, a dangerous villain, and a plan to rule the world, and you have the makings of a Pokemon epic! How will Ash and his friends get out of this predicament? Will the proud and stubborn Shaymin ever make it back to its friends in time?