You have to make Eevee really happy while it's is evolving,there is no certain level that will make Eevee evolve.
In FireRed and LeafGreen, the pokemon that evolve via the firestone are as follows: Eevee (into Flareon) Growlith (into Arcanine) Vulpix (into Ninetails)
You can't catch umbreon to get one have an evee have max friendship and train it while its nighttime it will evolve to umbreon.
By getting EEVEE to a high friendship level at night.
If you want Eevee to evolve into Espeon then train it during the day, other way 'round for umbreon (On LGFR you need the National Dex)
get an evee in celdon town save it in your PC beat the elite 4 with 100+ Pokemon caught get national pokedex get a sun stone take eveee out and use the sun stone on him if you want espeon and if you want umbreon give him a moon stone
To make Eevee evolve into an Umbreon, you have to level it up with high happiness at night.
well, umbreon can be a boy or girl. but in Pokemon rescues if you're an eevee and evolve into umbreon then it depends on your gender. in the Pokemon pearl and diamond there r mostly boys, well in my game.
Evolve it at 12 pm
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
Flareon can't evolve you can only evolve eevee into: /flareon/jolteon/vaporeon/leafeon/glaceon/umbreon/espeon
Well the weakest are umbreon and espeon because there all normal. But if i were to evolve my eevee i would evolve it into a Pokemon type i don't have or just put eevee in with a ditto boy and/or girl. actually umbreon is dark type and espeon is psychic, i would get flareon or jolteon
Eevee evolves to Umbreon when it has high happiness, and it levels up while it is dark.
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 can't, you have to max out eevee's happiness at night to evolve it into Umbreon.
Level it up at night
Moonstone
You can get an umbreon by getting an eevee from bill in goldenrod city (in a house) and then you can evolve eevee into umbreon by making it happy and leveling it up at night time.