Eevee
the evolution fennec
Eevee has an unstable genetic makeup that suddenly mutates due to the environment in which it lives. Radiation from various stones causes this Pokémon to evolve. The first three of these evolutions, Vaporeon, Jolteon, and Flareon, are the result of Eevee being exposed to either a Water Stone, a Thunderstone, or a Fire Stone respectively. Various evolutions have been introduced in Pokémon games since, including Espeon, Umbreon, Leafeon, Glaceon and Sylveon.
According to the Pokémon video games, Eevee is a mammalian creature with brown fur, a bushy tail that has a cream-colored tip, and a furry collar that is also cream-colored. Eevee has brown eyes, big ears, and pink paw pads. Eevee is said to have an irregularly shaped genetic structure, enabling it to evolve into multiple Pokémon.Eevee are quite rare in the games, but are canonically able to live almost anywhere, as they may evolve to suit their surroundings.