The official Japanese Pokemon Twitter has revealed M Scizor-EX from Rage of the Broken Sky! Thanks goes to Sean T. for the translation!
When 1 of your Pokemon becomes a Mega Evolution, your turn ends.
[M][M] Iron Crusher: 120 damage. You may either discard a Special Energy attached to your opponent’s Active Pokemon or discard a Stadium in play.
When a Pokemon-EX has been Knocked Out, your opponent takes 2 Prize cards.
Weakness: Fire (x2)
Resistance: Psychic (-20)
They’re getting creative with the giant attack text!