in Pokemon diamond ,pearl ,and platinum you find them underground other Pokemon games you are most likely to find them on the ground in small poke balls
You get a leaf stone underground.
A Leaf Stone can be found on Route 119.
Oddish-Lvl 21-Gloom-Leaf Stone-Vileplume Exeggcute-Leaf Stone-Exeggutor Bellsprout-Lvl 24-Weepinbell-Leaf Stone-Victreebell Seedot-Lvl 14-Nuzleaf-Leaf Stone-Shiftry
The department store doesn't have a leaf stone cause I've been to all of them nd they don't have a leaf stone
You can evolve nuzleaf and gloom into shiftry(evolved from nuzleaf with leaf stone)& vileplume(evolved from gloom with leaf stone).
weepin bell doesn't evolve at a certain level. you have to give it a leaf stone.
leaf stone
Trade a green shard to the hunter to get a leaf stone.
You can't I've tried looking but there in no leaf stone
The leaf stone is used to evolve certain poke'mon.
The leaf stone will evolve certain species of pokemon
to evolve gloom you need a leaf stone or a sun stone. sun stone=Bellossom leaf stone=Vileplume you can get a sun stone from a person in the space station and a leaf stone on route 119. hope i helped :)