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.
Watching the replays is helpful too and they can be found in a thread in the same subforum. You can see the types of builds that are used infer Hoopa's impact through that and watching the replays that involve it.
When are you on usually?