Pokemon blue is a 1st generation game. Espeon is a second generation pokemon. This means it didn't exist in blue.
You evolve an Eevee into and Espeon by raising it to max happiness. Pokemon gain happiness when you give them massages (in Goldenrod underground and Blue's sister.) It will take a while to reach max happiness. Then you level it up in the day. It will evolve into Espeon.
Espeon cannot evolve.
Espeon is the psychic evolved form of Eevee. It is a psychic pokemon.
Route 30
umbreon and espeon
Cheating.
Espeon.
no, it can not
Evolve it from eevee
i don't think you can without the Pokemon modifier code
You can't get espeon in leafgreen so trade one from Pokemon colosseum or ruby, sapphire or emerald or Pokemon xd gale of darkness.
Yes in shoal cave.