Instructions
Evolve Eevee into the electric-type, Jolteon, by giving him a Thunder Stone. Thunder Stones are typically purchased at the in-game department store. Eevee only evolves into Jolteon in the "FireRed," "LeafGreen," "HeartGold," "SoulSilver," "Diamond," "Pearl" and "Platinum" games.
Transform Eevee into the water-type, Vaporeon, by handing him a Water Stone. Like the Thunder Stone, Water Stones are purchased in the department store. Vaporeon is available in the same games as Jolteon.
Evolve Eevee into the fire-type, Flareon, by giving him a Fire Stone. Fire Stones are also available for purchase in shops. Evolving Eevee into Flareon is possible in every game but "Ruby," "Sapphire" and "Platinum."
Change Eevee into Espeon, a psychic-type, or Umbreon, a dark-type, by making him happy during the day or night, respectively. Eevee is happy when you use him in battles, give him any kind of item or give him a haircut. Espeon and Umbreon are available in "Diamond," "Pearl," "Platinum," "SoulSIlver" and " HeartGold."
Change Eevee into Leafon, a grass-type, by going to the Moss Rock area within Eterna Forest. Once there, Eevee evolves when you fight a wild Pokemon and level up. This is only possible in the "Diamond," "Pearl" and "Platinum" games.
Transform Eevee into the ice-type Pokemon, Glaceon, by heading to the Ice Rock on Route 217. When you reach the area, partake in a battle to level up Eevee, who automatically becomes Glaceon. Like Leafon, Glaceon is only available in "Pearl," "Platinum" and "Diamond."