You could get it from Bill in Goldenrod City.
Evee can be obtained as a gift from Bill, and can also be bought from the Game Corner for 6,666 coins.
No, you would have to transfer an Evee from one of your other games I.E. Heartgold soulsilver etc.
To my knowledge (not there yet) I assume eevee is male and evee needs to female to mate with ditto (as all pokemon)
lombre-ludicolo poliwhirl- poliwrath evee- vaporeon
u get Evee from bill in Goldenrod city.Bill's house is near the tunnel behind the Pokemon center.make sure u do not have your party full (i suggest u have 5 Pokemon instead of 6)
EVEE evolves at level 15
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.
Give it items like iron and zinc to raise its friedliness.Then train it at night time.
if you put it in 1st place
In Pokemon HeartGold and SoulSilver, an Eevee cannot evolve into a Glaceon. You can trade with other trainers from Diamond, Pearl and Platinum to get one.
no you can not catch evee in pokemon yellow but someone will give it to you
You have to use a leaf stone on your eevee. Sorry, I don't know where to find a leaf stone though. : ) hope this helped!