Its not quite what you were asking but there is also fliptini. It has an ability that lets you reflip a coin if you did t like the result. I cant remember if its victini or victini ex tho
I knew about the coin flip Shiftry but the combo with that Chaos Gym is awesome!
I know someone who's planning an Unlimited 150 deck with Shiftry so that should go in!
Also include Shiftry ex (Crystal Guardians) and Aerodactyl (Majestic Dawn) to put 4 damage counters on a Pokemon using a Power and you got the beginnings of a very nice lockdown deck there EricDent