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.
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.
you start with an espeon and umbreon
You can only get Espeon by evolving Eevee with maxed Friendship/Happiness during the Day, trading for it, or using the Pokemon Transfer to the Pokemon Bank.
Espeon is #196 in the national pokedex, and it is a Psychic type Pokemon.