You can't leafeon doesn't exist in leafgreen.
To evolve your Evee into Leafeon, get a leaf stone, and use it on Evee, and it will evolve into Leafeon! Have fun with Leafeon! -Garrett
In the woods before Eterna, there is a Mossy Rock, you must have an Evee with you and a rare candy, stand next to it and level up the Evee and it will evolve to Leafeon.
vulpix,growlite and evee
evee can evolve into any of its forms in leaf green.all you have to do is to buy the evulation stone you want and use it on evee
Trade it to ruby,sapphire or emerald have them evolve your evee at night then give it back to leafgreen.
You level up evee in eterna forest
you can't. there's no moss-stone to evolve it, so you'll need to trade it from diamond, pearl or platinum
No because there is no clock in leafgreen you must trade evee to a game with an internal clock to make it evolve to evee those games are ruby, sapphire and emerald also heartgold, soulsilver, diamond, pearl and platinum.
you can evolve evee to leafeon by taking leafeon to a stone in the forest by the second gym leader.
evee can evole into three things in firered and leafgreen. it can evolve into flareon if you use the fire stone, jolteon if you use the thunder stone, or vaporeon if you use the water stone.
Level it up at Eterna Forest.
no have to trade from dppt