A peculiar stone that makes certain species of Pokémon evolve. It is a clear, light blue.

Pokémon that evolve using a Water Stone:

First Form Bag Water Stone Sprite Second Form
Poliwhirl Poliwhirl Poliwrath Poliwrath
Shellder Shellder Cloyster Cloyster
Staryu Staryu Starmie Starmie
Eevee Eevee Vaporeon Vaporeon

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