Effect
Held: Allows Mewtwo to Mega Evolve into Mega Mewtwo Y.
Where to find it
Game abbreviations follow the standard Pokémon series conventions.
Core series
- X Y
- • Unknown Dungeon (after catching Mewtwo ) Y
- OR AS
- • Pokémon League (outside the front door)
- 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 - OR AS
- • 2016 Korean World Championship Series Mewtwo
Notes: South KoreaAlso: May 5 to 8, 2016 - X Y OR AS
- • Pokémon Scrap 2016 Mewtwo
Notes: JapaneseAlso: April 28 to August 31, 2016
Generations
Generation VIGeneration VIIGeneration VIIIGeneration IX