Effect
Held: Allows Mewtwo to Mega Evolve into Mega Mewtwo X.
Where to find it
Game abbreviations follow the standard Pokémon series conventions.
Core series
- X Y
- • Unknown Dungeon (after catching Mewtwo ) X
- OR AS
- • Littleroot Town (after defeating or capturing Groudon OR / Kyogre AS )
- S M
- • Event
Notes: Trade - P E
- • Cerulean Cave (from Green after defeating her)
- ZA
- • Event
- S M
- • Mewtwo Mega Stones
Notes: AllAlso: March 3 to October 31, 2017 - ZA
- • Side mission EX2: Project M
Notes: AllAlso: December 2, 2025 onward
Generations
Generation VIGeneration VIIGeneration VIIIGeneration IX