you can't.
there's no moss-stone to evolve it, so you'll need to trade it from diamond, pearl or platinum
You have to get it from platinum pearl or diamond you can give them the evee and than they evolve it into leafeon by lomay Pokemon expert
You can't evolve it to Leafeon.
Eevee can not evolve into porygon.
To evolve Eevee into leafeon
I think you use a leaf stone...
if you levels up eevee near it, it evolves into leafion
You have to level it up near the mossy rock in eterna forest.
you can find a leaf stone in viridian forest in kanto in heartgold
You do not need friendship to evolve Eevee into Leafeon. All you need to do is level Eevee in Eterna Forest.
Get Eevee from bill in glenrod city or from the betting place. The train him in entana forest. He should evolve there.You can't, except by trading an Eevee to D/P/Pt, evolving it to Leafeon in Eterna forest and trading it back to HeartGold.
yes
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
Level Eevee up at Eterna forest.
Eevee can not evolve into porygon.
In Pokémon HeartGold, you can only evolve Eevee 5 ways which would be: Using a Fire Stone on an Eevee into to evolve it into a Flareon, use a Thunderstone on Eevee in order to evolve it into a Jolteon, use a Water Stone on Eevee in order to evolve it into a Vaporeon, evolve it into Umbreon via level-up at night (which is between 8PM and 4AM) when it's happy enough and evolve it into Espeon via level-up during the day time. You can also evolve Eevee into Glaceon and Leafeon however evolving Eevee into Glaceon or Leafeon is not possible in "HeartGold" or "SoulSilver," Eevee can only evolve into Glaceon via level-up when it's near the Ice Rock which can only be found in the Sinnoh region near Snowpoint City and Eevee can only evolve into Leafeon when it's near the Moss Rock which can only be found in the Sinnoh region which is in the Eterna Forest.
To get a leafeon you need to get the eevee from bill in goldenrod city and level it in a grassy area
You can't leafeon doesn't exist in leafgreen.
Jolteon cannot evolve into Leafeon. Eevee can evolve into leafeon, but not Jolteon. You have to make eggs to get more eevees so you can evolve them.
Eevee can't evolve into leafeon in soulsilver you have to trade it to diamond and pearl and evolve it there. The ilex forest doesn't have a Mossy Rock - which is what evolves eevee into leafeon.