Prologue

By accident, Arceus and the creation trio unexpectedly flipped the world upside down; which cause utter chaos and madness to befall upon the Pokemon World.
Everything turned the opposite; Pokémon started catching humans, Gyarados evolves to Magikarp, Ash became a badass, Brock became president and more.
Only one still haven't been affected; and that is Mewtwo. Along with a badass Lucario named Luka, he was sent by Arceus to journey across the world to find Xerneas to ask for assistance in fixing the universe.
What could go wrong? Everything.