"Saisei, Light Screen!  Mega Ring activate!"  Shiranui activated his Mega Ring and Saisei glowed with the energy of Mega Evolution.  The Mewtwo shrunk in size and the glow disappeared to reveal a Mega Mewtwo Y that had a smile on its face.
"[i]Such unwavering determination,[/i]" Saisei commented as the Mewtwo conjured a barrier that reduced the damage of Zenni's attack just before it hit, "[i]This will be fun.[/i]"  Thanks to the Light Screen, the damage was low for a super effective hit.