Well, I'm not here to join... But a reason I'd like to point out is the rule of banned Pocket Monsters. Allowing one is just a big no in my eyes. It's like... hey, OU tournament, but you can use one uber. (How balanced is that?) You're not testing them in OU, so there's no point to allow them to begin with. Those Pocket Monsters are specifically banned due to their overwhelming power over the entire LC metagame, not banned due to other LC ubers. So, just because you can't use a multiple amount doesn't degrade their sheer force at all. Just saying I heavily disagree with that method. By the way, Cranidos isn't even LC uber anyway. O_o It's OU, but not uber. Not sure why you're giving it the restriction.
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Anyway, I like that you're trying to get PC envolved in this incredible metagame more. Good luck~ :D