if you go to eterna forest and go next to the moss rock, walk around a little bit till you get in a fight. level your evee up. (next to the moss rock of course.) it will turn into a leafeon!
What exactly is a 'moss stone'? It's not an evolutionary stone, and the closest item I can think of is the moss rock in Eterna Forest, which isn't in this game...
eterna forest top left corner
train in the eterna woods with an egg hatch it next to the moss stone then it will hatch as a gligar
Besides the moss stone and ice stone that is only in diamond, pearl and platinum you can get every other evee evolution by using evolutionary stones or having it evolve when it's loyal to you in the morning and at night. Use the fire stone, water stone and thunder stone to get vaporeon, jolteon and flareon. Get evee to be loyal to you then train it a level in the morning to evolve it to espeon and do the same only at night to get umbreon.
What is moss
What exactly is a 'moss stone'? It's not an evolutionary stone, and the closest item I can think of is the moss rock in Eterna Forest, which isn't in this game...
A rolling stone gathers no moss.
Moss stone is only made for decorative purposes. It is currently in no crafting recipes as of 1.3.1.
A rolling stone gathers no moss
Mythbusters have proven that a rolling stone will not gather moss. (to any measurable degree)
moss
eterna forest
A rolling stone gathers no moss
If your stone turned green it probably has moss growing on it.
moss
Stone + plant
It is mostly a decoration or building stone found in dungeons and formed around mob spawners.