Question: how to evolve eevee in pokemon xy?
Answer: After putting it in your party, give it a soothe bell to hold. Anything you can think of to raise your Pokemon's friendship (which is not to be confused with affection gained from Pokemon Amie), do so. Once its friendship is maxed, level Eevee up in the daytime to make it evolve into Espeon or at night for Umbreon.