Ash Ketchum: Journey Through The Multiverse

What will happen if Ash Ketchum, Son Of Arceus and the Immortal Hero Of the Pokeverse, journeys through different Universes each vasty different from the last. How will our Hero react, or better yet how will the people from the different Universes react when they meet the seemingly Immortal Demi-God with untold powers running in his views. (Pokemon X Multiple Crossover)