The leaf stone can be found in the following places
Route 7, Lostlorn Forest (With Dowsing Machine), , Wellspring Cave
(Dustcloud), Chargestone Cave (Dustcloud), Mistralton Cave
(Dustcloud), Twist Mountain (Dustcloud), , Victory Road (Dustcloud),
Giant Chasm (Dustcloud), Seaside Cave (Dustcloud), Rebirth Mountain
(Dustcloud), Clay Road (Dustcloud), Underground Ruins (Dustcloud),
Relic Path (Dustcloud), Caselia Sewers (Dustcloud), N's Castle
(Dustcloud)
And can be bought in the following places
White Forest, Gear Station, PWT, Join Avenue
Source
