Price
Effect
In battle
If held by a Latias, allows it to Mega Evolve into Mega Latias if its Trainer has a Key Stone. Each Trainer can only Mega Evolve one Pokémon per battle.
Unaffected by item negating effects (such as Embargo and Klutz). Item manipulating effects (such as Trick and Fling) cannot give Latias a Latiasite or remove a Latiasite from Latias.
Outside of battle
If held by a Latias, allows it to Mega Evolve into Mega Latias when it performs a Spectacular Talent during a Pokémon Contest Spectacular while its Trainer has a Key Stone. Latias will remain a Mega Latias until the Talent Round ends.
Description
| Games
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Description
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| XY
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One variety of the mysterious Mega Stones. Have Latias hold it, and this stone will enable it to Mega Evolve during battle.
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ORAS
SMUSUMPE
SwShBDSPLA
SV
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One of a variety of mysterious Mega Stones. Have Latias hold it, and this stone will enable it to Mega Evolve during battle.
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Acquisition
Distribution
Pokémon Shuffle
In Pokémon Shuffle, the Latiasite allows the player to Mega Evolve Latias.
The player can obtain the Latiasite by passing Level 50 on a Mega Latias escalation battle in Weeks 8 and 9 of the event rotation.
The Latiasite was also available as a prize during the Mega Latias escalation battles prior to the event rotation system. This escalation battle ran on the Nintendo 3DS version from September 28 to October 12, 2015; January 31 to February 14, 2017; and October 24 to November 7, 2017. It ran on the Pokémon Shuffle Mobile from November 24 to December 8, 2015; January 31 to February 14, 2017; and October 24 to November 7, 2017.
The Latiasite enables the following Mega Evolution:
| Stone
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Pokémon
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Type
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Effect
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Gauge
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Max 
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|
|
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Mega Latias
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Dragon
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Erases Pokémon on a random jagged line horizontally.
Actually erases two random jagged lines of Pokémon horizontally. These lines may cross.
|
22
|
13
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