Question: how to get eevee to evolve into espeon in pokemon crystal?
Answer: To evolve eevee into espeon you will need eevees happiness 220 or higher (the max is 255). In goldenrod city there is a women that will tell you it's happiness. If she says "I get the feeling it really trusts you" then your happiness is 200-249. This could be enough to evolve eevee, but if not then your not far off.