you can't. to get an espeon or umbreon, you need to evolve an eevee at certain time of day. leafgreen/firered don't have clocks. you have to trade the eevee to ruby/sapphire, max out friendship and level up in the pm for espeon, am for umbreon.
you can by evolving eevee but not by capturing
You can only trade it from the Johto region or the Hoen Region.
Charizard, suicune, flareon, absol, articuno, and espeon.
so far, you cannot evolve eevee either to umbreon or espeon on FireRed because on FireRed and LeafGreen, there is no clock system. You must trade eevee to Emerald for evolving to Espeon or Umbreon
You can't. It evolves by the time of day. Since there isn't a clock, eevee won't evolve into espeon OR umbreon.
You obtain an Eevee, then train it during the day. Do not give it an evolution stone or you will end up with a different Pokemon.
Only after you obtain the National Dex and you trade one over from Ruby/Sapphire/Emerald.
Evee will never evolve to espeon or umbreon in firered because the game doesn't have internal time so to get an espeon or umbreon you must trade your evee to a game with a internal clock like ruby, sapphire and emerald. Also you can trade an espeon obtained from colosseum or even xd gale of darkness.
Yes it is possible to get Espeon and Umbreon in Pokémon FireRed but you cannot physically evolve Eevee into either Espeon or Umbreon in Pokémon FireRed due to there being no time cycle in the game so you will need to evolve Eevee into Umbreon or Espeon in Pokémon Ruby, Sapphire or Emerald and then trade it over to FireRed.
Espeon cannot evolve.
Espeon is the psychic evolved form of Eevee. It is a psychic pokemon.
umbreon and espeon