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Effect / Mechanics
Held: Allows Blastoise to Mega Evolve into Mega Blastoise.
Source: PokeAPI
In-game description
"One of a variety of mysterious Mega Stones. Have Blastoise hold it, and this stone will enable it to Mega Evolve during battle."
Fling Power
80 Power
Power of the move "Fling" when using this item.