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Psystrike is a Psychic-type move learned by Mewtwo at level 100, and is Mewtwo's signature move in the Pokémon series as of Generation V. It is used as Mewtwo's Final Smash in Super Smash Bros. for Nintendo 3DS / Wii U. When activated, Mewtwo Mega Evolves into Mega Mewtwo Y, then fires a large ball of psychic energy across the screen in the direction Mewtwo is facing, stunning any opponents in its path. The stunned opponents then take heavy damage and are launched away as Mewtwo returns to normal. Opponents can be stunned even if they are in the air.
Super Smash Bros. for Wii U trophy information