During the world creation, Arceus - god of Pokémons - was attacked by a "dimensional Pokémon", severely injuring it in one blow. To face this terrible threat, Arceus called Palkia, Dialga and Giratina as reinforcements. After a fierce fight, the four legendary Pokémons had just enough strength to stand up to this mysterious Pokémon. They miraculously managed to force him back into his dimension. Arceus later realized that it was he who attracted this dimensional Pokémon, probably because he was the most powerful one in this universe. He then locked himself in his own dimension so as not to be threatened anymore. But among the inhabitants born from the creation of Arceus, a high-ranking person remembered the existence of the dimensional Pokémon. He had only one desire: to seize its power by any means possible. As the child of the League Champion, you will traverse and explore the Exodius region, pit your strength against its Gym Leaders, face the current Champion and become the most powerful trainer the region will ever know!