A, here is how to get Mewtwo via the Project M side mission and use a Mystery Gift to get the Mewtwonite X & Y Mega Stones.

Pokemon Legends ZA unveils a post-game mission, 'Project M,' to capture the iconic Mewtwo. Players must claim special Mega ...

A" once again surprised the trainers by allowing them to unlock Mewtwo, along with both of its iconic Mega Evolutions.