Prismatic Cosmos

Eons ago, a multidimensional being was born. It had the power to create realms all across the galaxy and distort ones currently existing. Ages later, it created a wormhole and gathered all sorts of Pokemon that happened to fall under the category of canines and felines, and as each of them traveled into the new realm, thus came a new society, run by only Pokemon.

The dimension the Pokemon thrived in was full of vivid colors, and a permanent rainbow in the sky during clear days. It was very likewise to their previous dimension, otherwise. The world had areas that could support any Pokemon, oceans, forests, you name it!