Espeon,unlike umbreon has amazing Sp.attack.It lacks good defensive stats but makes up for it with it's high speed. Espeon will be a good sp. sweeper but should be switched out when faced against dark types(unless you have a move to counter it) A good moveset for espeon would have to be:
Psychic
Calm mind
Shadow Ball
Double Team
Double team should be used fairly early in the battle to raise espeon's evasiveness. Calm Mind should be used to boost Sp. attack and Sp.Defence. Psychic should be the main attack as it has incredible power. Shadow ball should be used as a reserve when Psychic runs out of PP of if you are facing a Pokemon with resistance to Psychic type moves(like steel or Dark)
Overall,Espeon is a fairly good Pokemon with Great Sp. Attack but low Defensive stats. Espeon can fit in to pratically any team very well and th fact that it is a Psychic type Pokemon makes it a true threat(if used properly) against any Pokemon.
fighting types
I think you train an evee with good friendship in the daytime
Espeon cannot evolve.
Espeon is the psychic evolved form of Eevee. It is a psychic pokemon.
Charizard, suicune, flareon, absol, articuno, and espeon.
umbreon and espeon
Pokemon blue is a 1st generation game. Espeon is a second generation pokemon. This means it didn't exist in blue.
Cheating.
Evolve it from eevee
no, it can not
Espeon.
You can't get espeon in leafgreen so trade one from Pokemon colosseum or ruby, sapphire or emerald or Pokemon xd gale of darkness.