You have to use stones to get eevee to evolve, or level eevee up under certain conditions.
Vaporeon: Water stone (Rt. 213/Unearth in the Underground)
Jolteon: Thunderstone (Sunyshore City/Unearth in the Underground)
Flareon: Fire stone (Fuego Ironworks/Unearth in the Underground)
Leafeon: Level up eevee in Eterna Forest
Glaceon: Level up eevee on Rt. 217
Espeon: Level up eevee in the morning or afternoon once it's friendship is high enough
Umbreon: Level up eevee at night once it's friendship is high enough
Eevee doesn't have a set level to evolve into Umbreon. All you have to do to evolve it is max out its happiness at night. ~KKMG1
you have to level him up at night
Jolteon does not evolve, but to get a Jolteon you need a thunderstone to evolve an Eevee into Jolteon.
Take your Eevee to the Eterna Forest and level it up next to the moss rock.
if i get eevee in level 20 what level eevee need to evolve into espeon
Eevee doesn't have a set level to evolve into Umbreon. All you have to do to evolve it is max out its happiness at night. ~KKMG1
you have to level him up at night
Level eevee up next to the icy stone near Snowpoint.
Level it up at night
First you have to get Eevee from Bebe. Then boost Eevee's happiness to the max. Then level it up and it will evolve.
Jolteon does not evolve, but to get a Jolteon you need a thunderstone to evolve an Eevee into Jolteon.
Take your Eevee to the Eterna Forest and level it up next to the moss rock.
By getting EEVEE to a high friendship level at night.
if i get eevee in level 20 what level eevee need to evolve into espeon
Make your eevee like you as much as it can, then level it up at night. Use a soothe bell if your in a hurry
Can only evolve from Eevee if it gains a level while on Route 217, so you must trade an Eevee over to Diamond, Pearl, or Platinum and evolve it there, since there is no Route 217 in HeartGold and SoulSilver.
use a firestone on eevee