A Poketuber made a Carbink/Machamp/Ariados deck, and it performed pretty well. Very straightforward as well, 2-2 Carbink, 3 Machamp, 2-2 Ariados, 2 Shaymin. Ran FFB over Heavy Boots, but of course you can tweak that at any time. I think Machamp may be a nice under-the-radar deck, but Mewtwo...