A mysterious evolutionary lump. When held, it raises the Defense and Sp. Def of a Pokémon that can still evolve.
Eviolite is a held item introduced in Generation V.When the player gives an Eviolite to a pokemon that is capable to evolve, it raises the Defense and Sp. Def of the Pokémon's stats by 50%. Even though its Japanese translation is Evolution Stone, it does not evolve any Pokémon. It is obtainable in Castelia City in the topmost building in the road above the park in the middle of Castelia City. Have at least 40 Pokedex entries and speak to the scientist to obtain the Eviolite.