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Effect / Mechanics
Held: Allows Diancie to Mega Evolve into Mega Diancie.
Source: PokeAPI
In-game description
"One of a variety of mysterious Mega Stones. Have Diancie 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.