Mega Stone

A Mega Stone is a type of item that, if activated with a Key Stone, causes a specific Pokémon to undergo Mega Evolution. Professor Sycamore in the Kalos region theorizes that Mega Stones are the results of Evolution stones being irradiated by the power of the Legendary Pokémon of life and destruction, during an cataclysmic event from long ago.

Mechanics & Inner Workings

During battle, a Mega Stone can be activated while its corresponding Pokémon is on the field. The stone must be held by the Pokémon. The Pokémon's Trainer can use their Key Stone to activate the Mega Stone at the start of a turn, causing the Pokémon to undergo Mega Evolution. Mega Stones are not consumed upon use, but only one Mega Stone use is possible per Trainer per battle. Mega Stones cannot be activated for Pokémon that have transformed into their corresponding Pokémon (either by Transform or Imposter).

An item that allows a Pokémon to Mega Evolve when used in conjunction with a Mega Ring. Each Mega Stone is specific to one species and Mega Evolved form.

Item type

Unique Artifact

Related Condition

Mega Evolution

Unlike other Held Items, Mega Stones cannot be removed from their users once Mega Evolution has been activated, even through the effects of Moves like Knock Off and Abilities like Magician.