It was really hard for me to figure it out, but if you surf on route 213 and through the rocks, you should find it. Just look around 213, it'll be there.
In Diamond, you can obtain a Water Stone in the underground in Sunyshore City.
to evolve certain Pokemon
evee
A Water Stone evolves a Poliwhirl, Shellder, Staryu, Eevee, and Lombre.
what do you mean
an Eevee, use a water stone on it to evolve it into a vaporeonEevee into VaporeonPoliwhirl into PoliwrathLombre into LudicoloShellder into CloysterStaryu into Starmie
you can find one while mining
Thunder stone =Jolteon Water stone = Vaporeon.Fire stone = Flareon.
go underground and keep digging till u find a water stone or a fire stone
To get the Pokemon Poliwrath in Pokemon Diamond version you have to evolve a Polywhirl. To do this, you need to expose it to a water stone.
there is 1 at route13 with surf. or go underground.
you can't you have to get poliwhirl and then use a water stone on it [which is underground]