Underground or the ruins.
for evolving Pokemon
The Leaf Stone may be used on Gloom, (evolving it to Vileplume,) Weepinbell, (evolving it to Victreebel,) and Exeggcute, (evolving it to Exeggutor,) in Pokemon Fire Red.
It keeps the Pokemon holding it from evolving.
The only Pokemon is Happiny>Chansey.
its for evolving pokemon.. eg. gloom --> bellosum
Cloyster, you get it by evolving Shellder with a Water Stone.
some only evolve by using a evolving stone there's alot of those in pokemon platinum but you can only use the evolving stone on them when there a certain level or the best way train them faster cause them evolving doesn't make the, stronger just changes there look.
The moon stone like other Pokemon games are used for evolving pokemon such as nidoran, nidorino, jigglypuff, Evee, ect some more.
you use it on some water type Pokemon to evolve them. example:pikachu+thunder stone example:polywhirl+water stone example:evee+fire stone example:Roselia+sun Stone example:murkrow+dusk stone a ever stone prevents your Pokemon from evolving
There is a way to stop Pokemon from evolving. You let the Pokemon hold a certain stone.
A delcatty is a normal type Pokemon From the hoenn and you get one by getting a skitty and evolving from a moon stone.
The sun stone is for evolving Pokemon. gloom+sunstone=bellossom sunkern+sun stone=...... I forgot the name.