First you Have to get eevee from the celadon city mansion ( Where the lady gives you tea ) You go behind the building and enter from the back climb to the top and get your eevee. Train you eevee and if you battle it alot in the P.M hours 12:00 P.M - 11:59 P.M.
It will grow a friendship with you and will evolve ( Make sure its only in the P.M ) and theres your espion!
First, beat the E4, get the national dex, and raise an Eevee from 12 afternoon to 12 at night. It has to be happy with you in order to evolve. Whereas Umbreon, you need to start at 12 at night to 12 in the afternoon. It has to be in-game time though. Check the clock in the bedroom, or wait until it's 12 in the afternoon to begin trainning your Eevee.
Espeon and Umbreon cannot be obtained in Leafgreen because no in game clock feature exists so you will need to trade one from a game that does feature this like Ruby and Sapphire.
You can't.
All starters, including Bulbasaur, can't be caught in Pokemon LeafGreen.
If you trade Pokemon between leafgreen and ruby ruby will have your leafgreen Pokemon and leafgreen will have the ruby Pokemon both in the party they will not be sent to the PC unless you personally walk to the PC and do so.
You can only mix records between Pokemon ruby, sapphire and emerald not leafgreen.
Espeon and Umbreon cannot be obtained in Leafgreen because no in game clock feature exists so you will need to trade one from a game that does feature this like Ruby and Sapphire.
Evolve Eevee, or trade.
BY HAPPYNESS IN DAY IF IT is umbroen is in night
Yes you can trade leafgreen version Pokemon to another leafgreen version.
espion is in places like graves and caves...
level up eevee in the morning
Not in Pokemon leafgreen only in Pokemon Firered never ever in Pokemon leafgreen And in Pokemon firered it is rare in power plant not available in Pokemon leafgreen?
Nidorino, Nidorina, Skitty, Jigglypuff, Clefairy.
If you mean Espion (the psychic eeveelution) then find in Eevee in the Pokemon Mansion Trophy Garden and level it up when it's friendship is high enough between 8am and 4pm, it will then evolve into Espion. There is no Pokemon called Elspon sooo lol
you should go to gamestop