[@Ardent Dawn] Okay, someone is going to have to help me hear. DIDN'T play that game. How do we stop Xerneas? Legendary Birds, get their treasures to Lugia's Shrine. Groudon and Kyogre, seal them with their orbs and get Rayquaza involved. Mewtwo, turn a whiny pokemon trainer to stone. 

How do we imprison Xerneas?