Which Pokemon evolve with a water stone?

Answer

Staryus. I think that's it.

Answer

Staryu, Lombre, Poliwhirl and Eevee.

Answer

The following Pokemon evolve when exposed to a Water Stone:

Lombre to Ludicolo

Staryu to Starmie

Eevee to Vaporeon

Poliwhirl to Poliwrath

Answer

You can also evolve Shelder into Cloyster with a Water Stone.
Lots of water pokemon like shielder or eevee ( eevee counts as a muilty type