There are a whole bunch. I'm pretty sure i won't be covering all of them, but anyways here are the ones i know of off the top of my head:
1: A leaf stone can be used on Gloom to evolve it into a Vileplume.
2: A leaf stone can be used on Weepinbell to evolve it into a Victorybell.
3: A leaf stone can be used on Paras to evolve it into a Parasect.
4: A leaf stone can be used on Exeggcute to evolve it into a Exeggutor.
And just to get this clear, Evee does not evolve into a leafeon with a leaf stone.
The leaf stone will evolve certain species of pokemon
You get a leaf stone underground.
Take a leaf stone and use it on him.
A leaf stone it will become vileplume.
You might be able to use a leaf stone on the Pokemon Budew,and Roselia. But even though it might not work. P.S. DONT GET YOUR HOPES UP!!! You might be able to use a leaf stone on the Pokemon Budew,and Roselia. But even though it might not work. P.S. DONT GET YOUR HOPES UP!!! You might be able to use a leaf stone on the Pokemon Budew,and Roselia. But even though it might not work. P.S. DONT GET YOUR HOPES UP!!! srry guis but budew evolves by lvl and give a shiny stone to Roselia to evolve her into roserayd
leaf stone
use it to evolve nuzleaf to shiftree.
Use a leaf stone on it
When you want it. It evolves with Leaf stone.
The leaf stone will evolve certain species of pokemon
You get a leaf stone underground.
some Pokemon you use a leafstone on are nuzleaf, execute,gloom, and victrebell
bulbasaur 3:)
catch an eevee and use a leaf stone on it
Pansage
use a leaf stone on it
The only Unova Pokemon that evolves with a Leaf Stone is Pansage.