The Eviolite (Japanese: しんかのきせきEvolution Stone) is a type of held item introduced in Generation V. It boosts the Defense and Special Defense of a Pokémon that holds it if the holder is not fully evolved.
This section is incomplete. Please feel free to edit this section to add missing information and complete it. Reason: Does it check the Pokémon's species before or after using Transform (in each generation)?
Eviolite was introduced as a Pokémon Tool card in the Pokémon Trading Card Game during the English Black & White Series (the Japanese BW Era) in the Noble Victories expansion. When this Trainer card is attached to a Basic Pokémon, any damage done to this Pokémon by attacks is reduced by 20, after applying Weakness and Resistance.
Trivia
Eviolite's Japanese name contains a pun; しんかのきせき Shinka no Kiseki can also be taken to mean "Miracle of Evolution".