No problem. UU means Under Used, it's a Tier in Pokemon. There's Uber, Overused, Borderline, Underused, Neverused. Standard rules are pretty much just no evasion / accuracy effecting moves or items(such as double team, and lax incense), only 1 of a certain Pokemon in a team(so you can't use like 6 charizards), and you can only put one Pokemon to sleep at a time. Those are the more important rules.