Fan Game Oops! All Eevees Launches for Pokémon FireRed

A fan game called Pokémon Oops! All Eevees has been released, replacing every monster in Pokémon FireRed with an Eeveelution. The project comes from developer 999999999 and introduces 326 Eeveelutions into the base game.

The game includes expanded movesets for all existing Eeveelutions, generous Rare Candies, a new endgame, trainer outfits that let you look like an Eeveelution, and a built-in way to 'evolve' yourself. The developer teased on social media that there are secret Eevees located under the Truck or in Cerulean Cave.

An update is planned for Nov. 21, Eevee day in Japan, which will add more Pokédex entries and additional overworld sprites. The developer also claims the game introduces an 'Eevee god' that is every elemental type at once and is not the final boss.

It has been 13 years since Game Freak introduced a new Eevee monster in Pokémon X and Pokémon Y. Pokémon Winds and Waves could potentially introduce a new Eevee, but that game doesn't seem to be coming out any time soon.

Polygon first reported on the release.