"Team Flare uses mind control to force the Vaniville townspeople to transport a huge tree containing legendary Pokémon Xerneas to help them complete their ultimate weapon! Can X and his friends stop them and rescue Y's mother from their clutches ...? Luckily Trainers Gurkinn, Korrina and Diantha arrive to help--each with a Mega-Evolving Pokémon!"--Page 4 of cover.

Red is improving rapidly as a Pokemon trainer-- and so is his competition. But now Red must team up with his biggest rival Blue and thief Green to defeat a common enemy!