An Eevee has an unstable genetic makeup that suddenly mutates due to its environment. Radiation from various stones causes this Pokémon to evolve.
Biology
Physiology
Eevee is a small, fennec fox-like creature with bushy, brown fur. Its muzzle is very cat-like, with a small, black, triangular nose. It has a fluffy cream-colored mane around its neck and a short, bushy, fox-like tail with a cream tip. Eevee has round, deep-brown eyes, long, rabbit-like ears, and pink paw pads on its little feet. Its paws are small with three toes and no visible claws.
Eevee, as well as its evolutions, possesses traits from different animals. Eevee shares most traits with the fennec fox. However, it also shares traits with dogs, cats and rabbits. Eevee is said to have an irregularly-shaped genetic structure, enabling it to evolve into multiple Pokémon.
A shiny Eevee was obtainable in Beta 4.0 as a New Year reward.
The only two offensive moves Eevee can learn by TM-Shadow Ball and Earthquake-are types that Eevee cannot evolve into, meaning none of its evolutions can receive STAB from them.
Design Origin
Eevee shares characteristics with foxes (especially the fennec fox), dogs, and cats.
Name Origin
Eevee comes from E V, the first two letters in the word evolution.