Eevee evolves into Flareon when exposed to a Fire Stone.Eevee evolves into Jolteon when exposed to a Thunder Stone.Eevee evolves into Vaporeon when exposed to a Water Stone.It evolves into one of eight different Pokémon through various methods. Pokémon Brilliant Diamond and Shining PearlĮevee ( Japanese: イーブイ Eievui) is a Normal-type Pokémon introduced in Generation I.