Story time with Mewtwo! Get ready for butchered stories about legendary Pokémon as I attempt to fill in plotholes!
When Arceus was born, it was alone in a vast, empty space. Taking the shattered fragments of its egg, it pieced them together to form a sky. But the sky seemed empty without something underneath, so Arceus created the land.
As time went on, Arceus had created a beautiful planet, but it was devoid of water. Without water, there was no life. Even a legendary has feelings, and Arceus was rather lonely by itself. Shedding tears, they formed the seas.
To have somebody to share this new world with, Arceus created Mew's race, and for a while everything seemed alright. It wasn't lonely anymore, and the Mew were cheerful, funny Pokémon.
But then all but one of the Mews died, and to preserve his last friend Arceus made her immortal. But there cannot be life without death, and so Mew was unable to bear children. To ease his friend's grief over losing her friends, he created many, many new Pokémon to play with her.
Finally, Arceus decided that he grew weary of managing everything. So he created the human race, and entrusted Mew to guide the new creatures into becoming the new controllers, and when all was said and done Arceus retreated into slumber along with Mew. The younger legendaries, however, decided to roam the land in journeys similar to those of humans, but after a couple of centuries they too grew tired and retreated into slumber.
Deep inside a swirling mass somewhere in another timeline, another egg waits for the right moment to start the world anew.
Me: You know what? This is only Arceus' story, which explains why I cut through so much. Tell me if I should do any more, I'm kinda neutral. I plan on doing Giratina...Based off Mademoiselle Noir.