IIRC, evolution stones can be found the the wireless Underground. You first get to access this when you reach the town where you get the Bicycle.
You get a leaf stone underground.
South of the fuego ironworks there is a hidden one
You will have to evolve your exeggcute with a leaf stone. You can find exeggcute in the safari zone.
you have to have sex to get a leaf stone you have act sexy baby...
Eevee
eevee in lefeon
A gloom will evolve into a vileplume.
Gloom to VileplumeWeepinbell to VictreebellExeggcute to ExeggutorNuzleaf to Shiftry.I assume you mean Leaf Stone, and your answer in Lombre into Ludicolo.
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
Gloom Nuzleaf There may be more....
catch a Roselia then evolve it with a leaf stone.
To get a Victreebel, use a leaf stone on Weepinbell.