Things You'll Need
Instructions
Find an Eevee in "Pokémon LeafGreen." Go to the top floor of the Department Store in Celadon City and talk to everyone on that level to receive an Eevee as a gift.
Trade Eevee to "Pokémon Ruby," "Pokémon Sapphire" or "Pokémon Emerald." You need to move Eevee to one of these "Pokémon" games because evolving Eevee into Espeon depends on the time of day, and "Pokémon LeafGreen" does not have a time function.
Raise the happiness level of Eevee to get it to evolve into Espeon. Use expensive vitamin items, such as Carbos and Calcium, on it, while avoiding bitter food items. Always keep Espeon in your party and walk long distances to bond with the little creature. Once it has a high level of happiness, level Eevee up during the day to have it evolve into Espeon.
Trade Espeon back to "Pokémon LeafGreen" from the "Pokémon" game you used to evolve Eevee.