Mewtwonite X

	Pokémon Global Link artwork
	Introduced in Generation VI
Pocket
Generation VI	Items
Generation VII	Items
Fling
Power	80

The Mewtwonite X (Japanese: ミュウツナイトX Mewtwonite X) is a type of held item introduced in Generation VI. It is the Mega Stone that allows Mewtwo to Mega Evolve into Mega Mewtwo X.

In the core series games

Price

Games	Cost	Sell price
XY ORAS SM USUM PE	N/A	N/A

Effect

In battle

If held by a Mewtwo (or is present in the player's Bag)^PE, allows it to Mega Evolve into Mega Mewtwo X 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 Mewtwo a Mewtwonite X or remove a Mewtwonite X from Mewtwo.

Outside of battle

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

Description

Games	Description
XY	One variety of the mysterious Mega Stones. Have Mewtwo hold it, and this stone will enable it to Mega Evolve during battle.
ORAS SM USUM SwSh BDSP LA SV	One of a variety of mysterious Mega Stones. Have Mewtwo hold it, and this stone will enable it to Mega Evolve during battle.
PE	One of a variety of mysterious Mega Stones. This stone will enable Mewtwo to Mega Evolve during battle.

Acquisition

Games	Finite methods	Repeatable methods
XY	Unknown Dungeon (after catching Mewtwo)^X
ORAS	Littleroot Town (after defeating or capturing Groudon^OR/Kyogre^AS)
SM	Event	Trade
USUM		Battle Tree (64 BP)
PE	Cerulean Cave (from Green after defeating her)

Distribution

Games	Event	Language/Region	Distribution period
SM	Mewtwo Mega Stones	All	March 3 to October 31, 2017

In spin-off games

Pokémon Shuffle

In Pokémon Shuffle, the Mewtwonite X allows the player to Mega Evolve Mewtwo and Shiny Mewtwo.

The player can obtain the Mewtwonite X by defeating Mega Mewtwo in Stage 350 found on Desert Umbra.

The Mewtwonite X was also available as a prize during the Mega Mewtwo X competitive stage. This competitive stage ran on both the Nintendo 3DS and Mobile versions from January 3 to 10, 2017 and August 29 to September 5, 2017.

The Mewtwonite X enables the following Mega Evolutions:

Stone	Pokémon			Type	Effect	Gauge	Max
			Mega Mewtwo	Fighting	Replaces Pokémon (max 3) of the same type as Mega Mewtwo X. Converts three tiles containing a single Fighting type into Mega Mewtwo X	15	9
			Mega Mewtwo	Fighting	Erases all Mega Mewtwo X in the puzzle area.	12	3

In animation

A Mewtwonite X in Pokémon Evolutions

Pokémon Evolutions

A Mewtwonite X and a Mewtwonite Y appeared in The Discovery, under Green's possession. After discovering that Elaine had managed to catch Mewtwo before her and being defeated in battle by her, Green gave the Mega Stones to her.

In the manga

A Mewtwonite X in Pokémon Adventures

Pokémon Adventures

X & Y arc

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 Mewtwo. After Mewtwo's Mega Evolution into Mega Mewtwo Y was undone while battling Lysandre and Zygarde, 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.

In other languages

Language		Title
Chinese	Cantonese	超夢進化石Ｘ Chīumuhng Jeunfa Sehk X
Chinese	Mandarin	超夢進化石Ｘ / 超梦进化石Ｘ Chāomèng Jìnhuà Shí X
French		Mewtwoïte X
German		Mewtunit X
Italian		Mewtwoite X
Korean		뮤츠나이트X Mewtwonite X
Spanish		Mewtwoita X