Looking back on it, I'm not really sure why they're all there. Some ultra balls would probably be more useful by far - after a few test runs I found it took a couple of turns to get a Wailord EX or two onto the playing field.
This deck is just a little idea for after the release of 'Ancient Origins'.
Pokemon:
4 Cottonee (AOR)
4 Whimsicott (AOR)
3 Wailord EX
Trainers/Supporters/Stadiums:
4 Level Ball
3 Dive Ball
2 Lucky Helmet
4 Switch
2 Lysandre
2 Weakness Policy
2 Pokemon Fan Club
2 Escape Rope
2 Trainer's Mail...
Pokemon:
2 Manectric EX
2 M Manectric EX
2 Magnezone EX
3 Pikachu
3 Raichu (XY)
4 Carbink (ROS)
2 Suicune (PLB)
Trainers:
4 Pokemon Fan Club
4 Evosoda
2 Battle Compressor
2 Rough Seas
2 Sky Field
3 Energy Retrieval
2 Professor's Letter
2 Professor Sycamore
2 Shauna
2 Professor Birch's...
Pokemon: 13
4 Poliwag (XY Furious Fists)
2 Poliwhirl (XY Furious Fists)
3 Poliwrath (XY Furious Fists)
1 Politoed (XY Furious Fists)
1 Greninja EX
1 Blastoise EX (Any other water EX will do, this is mainly to stall whilst getting the Polis into play)
1 Kyogre
Trainers/Supporters/Stadiums...