No Pokémon can 'use' an Everstone in the games. The Everstone is a held item that prevents a Pokémon from evolving. Any Pokémon can hold it, though it only effects those who evolve (by not letting them evolve).
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Give them a everstone or press b when they are evolving ;)
you can catch a ralts on route 102 and put an everstone on it, then it will learn hypnosis at level 41
No Pokemon evolves with an everstone. In fact, an everstone negates the effects of evolution if you give it to a Pokemon to hold.
What u do with a everstone is u give it to a Pokemon and it wont evolve
The everstone stops evolving all Pokemon that evolve in the first place.