well, actually my friend, and so does andyman, from the formums here, play that deck, but with grumpig it's like 50% faster than polistall.He took out, 2!!steelix ex with it, but unlike politoed EX, he can use ATM rock
so in 2 turns he took out a steelix ex, when the other one was ready, he already had done another 80 damage, ATM rock, And he also used a ditto :d he used steelix ex's mudslide taking out, I think pidgeot.
in another mach he beated the 11th best player in the world with that deck! it was amazing he totally beated that rock-lock deck
I think grumpig deck is better than polistall, it's way faster.
about the fossils, my friend, if he can, he uses briney on them, because when the deck is out of fossils it's useless, he need 2 fossils in play, ALWAYS, if he does not he gets warpointed to death..that's why he rather doesn't discard them, but eventually, he has to