If held by aBlastoise (or is present in theplayer'sBagPE), the Blastoisinite allows it toMega Evolve into Mega Blastoise if itsTrainer has aKey Stone. A Trainer can only Mega Evolve one Pokémon per battle (or only have one Mega-Evolved Pokémon at any given momentZA).
As aMega Stone, it is unaffected by item-negating effects (such asEmbargo andKlutz). Item-manipulating effects (such asTrick andFling) cannot give or remove a Blastoisinite from Blastoise.
Outside of battle
If held by a Blastoise, the Blastoisinite allows it to Mega Evolve into Mega Blastoise when it performs aSpectacular Talent during aPokémon Contest Spectacular if its Trainer has a Key Stone. Blastoise will remain a Mega Blastoise until theTalent Round ends.
The player can obtain the Blastoisinite by completingMission Card 12.
The Blastoisinite was also available as a prize during the Mega Blastoisecompetitive stage. This competitive stage ran on the Nintendo 3DS version from April 6 to 12, 2015 and June 15 to 22, 2015. It ran on the Pokémon Shuffle Mobile from February 9 to February 15, 2016.
The Blastoisinite enables the following Mega Evolutions:
Erases all Pokémon within two spaces of the match. If more icons of this Pokémon are adjacent to the match, then for each additional icon, one more Pokémon is erased in that direction.
A Blastoisinite belonging toSiebold appeared inMega Evolution Special I, where it was revealed during his battle withAlain. The Blastoisinite is worn around Blastoise's head.
Mega Ring System Blastoisinite
Blastoise, Mega Blastoise & Blastoisinite metal charm set
