Question: how to evolve eevee into espeon pokemon ruby?
Answer: Eevee evolves to espeon when its friendship reach at least 220 after it gains a level at day or morning (12:00 pm- 11:59 pm). You can check time in your house in littleroot. You can check your friendship level by going to verdanturf (southwestmost house), and watch out for the message in 0:46-0:48.