Thanks to @Biryu, we now have a lovely image of the Full Art version of M Blastoise-EX from the upcoming CP6 20th Anniversary set! CP6 releases in just a couple days on September 16th, but the set will probably leak tomorrow.
[W][W][W] Hydro Bombard: 120 damage. This attack does 30 damage to 2 of your opponent’s Benched Pokemon. (Don’t apply Weakness or Resistance for Benched Pokemon)
Weakness: Grass (x2)