Mewtwonite Y


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The Mewtwonite Y (Japanese: ミュウツナイトY Mewtwonite Y) is a type of held item introduced in Generation VI. Along with the Mewtwonite X, it is one of the Mega Stones associated with.

Price

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In battle
If held by a (or is present in the player's Bag), allows it to Mega Evolve into Mega Mewtwo Y if its  has a Key Stone. Each Trainer can only Mega Evolve one Pokémon per battle.

Unaffected by item negating effects (such as and ). Item manipulating effects (such as and ) cannot give Mewtwo a Mewtwonite Y or remove a Mewtwonite Y from Mewtwo.

Outside of battle
If held by a Mewtwo, allows it to Mega Evolve into Mega Mewtwo Y when it performs a during a Pokémon Contest Spectacular while its Trainer has a Key Stone. Mewtwo will remain a Mega Mewtwo Y until the Talent Round ends.

Description

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Acquisition

 * (after catching )
 * Ever Grande City (outside the Pokémon League)
 * Event (Mewtwo Mega Stones)
 * Battle Tree (64 BP)
 * Cerulean Cave (from after defeating her)
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 * Event (Mewtwo Mega Stones)
 * Battle Tree (64 BP)
 * Cerulean Cave (from after defeating her)
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 * Battle Tree (64 BP)
 * Cerulean Cave (from after defeating her)
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 * Cerulean Cave (from after defeating her)
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In the Pokémon Adventures manga
In Mewtwo Angered, Blaine was revealed to be in possession of both a Mewtwonite X and a Mewtwonite Y, which he can use to Mega Evolve. After Mewtwo's Mega Evolution into Mega Mewtwo Y was undone while battling Lysandre and, Blaine swapped its held Mega Stone, allowing Mewtwo to Mega Evolve into Mega Mewtwo X and keep on fighting. Blaine then explained that due to the unique bond he and Mewtwo share, Mewtwo is able to Mega Evolve more than once per battle.