You can get a leaf stone by going to the last pier on the right in Castellia City and talking to the man on the bottom of the screen and telling him you want to evolve Pansage.
And not only there, there's one on Route 6. Just choose between fire stone or water stone!
You can evolve certain pokemon like weepinbell
pansage = leaf lampent = dusk
a grass Pokemon
The leaf stone can evolve a pansage into a simisage.
i dont now where can i find a leaf stone in pokemon flora sky but i can find water stone in pokemon flora sky in malias city you can find the water stone there a house and a sign board read the sign board in sign board written malias library go into when go in malias library dont go up talk to seaman and he give you a water stone
Pansage will evolve by using a Leaf Stone into Simisage.
The only Unova Pokemon that evolves with a Leaf Stone is Pansage.
Pansage
Go to black city and gain people from pokemon white's white forest who gives you the option of selling leaf stone. After, save, go to the market that just appeared in your city and buy (expensive) leaf stones.
Petilil will evolve with a sun stone, pansage with a leaf stone, panpour with a water stone, and pansear will evolve with a fire stone.
The Leaf Stone can only make 5 pokemon evolve. Gloom into Vileplume, Weepingbell into Victreebel, Exeggcute into Exeggcutor, Nuzleaf into Shiftry, and Pansage into Simisage.
So far (although I have completed White not yet Black) all I know are Pansage (Leaf Stone), Pansear (Fire Stone) and Panpour (Water Stone). Sorry if this isn't as helpful as you hoped!
route 6
pansage
hm im not sure
give it a leaf stone
Evee->Leafeon.Sorry. Its Pansage.Also Sunkern in white forest/black city.There may be others so experiment =)It's Always an anserbold italics done by me, Chao141