It depends on what you want to evolve the Evee into. Use the following methods:
Flareon: use a fire stone
Vaporeon: use a water stone
Jolteon: use a thunder stone
Espeon (only for Johto and later): Take care of Eevee, give massages, and train during the day
Umberon (only for Johto and later): Take care of Eevee, give massages, and train during the night
Leafeon (only for Sinnoh or later): Train Eevee near the moss rock in the Eterna Forest
Glaceon (only for Sinnoh or later): Train Eevee near the ice rock below Snowpoint City.
To evolve your Evee into Leafeon, get a leaf stone, and use it on Evee, and it will evolve into Leafeon! Have fun with Leafeon! -Garrett
You level up evee in eterna forest
EVEE evolves at level 15
You have to wait a while after you get to pick who evee will evolve into (umbreon) You have to wait a while after you get to pick who evee will evolve into (umbreon)
you have to either give it a fire stone, water stone, or a leaf stone and those will evolve the evee that you have
it cant evolve... if you evolved it from evee then.... yeah you cant evolve it
depends what do u want it to evolve into?
it depnds were u evolve it
you have to evolve evee
evee can evolve into any of its forms in leaf green.all you have to do is to buy the evulation stone you want and use it on evee
evee is one you could evolve into espeon
give it a sun stone