Welcome to Smogon! Take a moment to read the Introduction to Smogon for a run-down on everything Smogon, and make sure you take some time to read the global rules.
Something I'd like to clarify: are platinum/hgss moveset expansions going to be made legal/illegal at certain times (eg, in october 2009 aggron became legal, can it use head smash?)
NailsOU: Since there's no way to control people using Platinum/HGSS movesets in rounds before the games were released, PlatinumHGSS moves will be allowed in all rounds.
NailsOU: Since there's no way to control people using Platinum/HGSS movesets in rounds before the games were released, PlatinumHGSS moves will be allowed in all rounds.