in a pokeball on the top floor of celadon mansion.
Evee can be obtained only from firered and leafgreen and Pokemon xd gale of darkness.
You can't leafeon doesn't exist in leafgreen.
vulpix,growlite and evee
You can't get evee in colosseum get one from xd gale of darkness or firered and leafgreen.
i think u have to trade from Pokemon leafgreen or firered
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
you cant! you have to use a fire stone on evee
No, you might be thinking of evee which you have to trade for firered or leafgreen
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.
Evee can be found in the back entrance of the Celadon Mansion which is directly left from the Pokemon Center.
Have firered or leafgreen trade one to ruby or get the one from Pokemon xd gale of darkness.
Trade it to ruby,sapphire or emerald have them evolve your evee at night then give it back to leafgreen.