Legendary Pokémon

How do wifi tournaments work? As in how do you sign up how do you know who to fight against and everything else. can someone please tell me.

You sign up by posting in the tournament's thread before the tournament starts saying that you are willing to participate. The tournament organizer will post the pairings for each round and you get to battle the person you were paired against. You then report your result and the tournament goes on.

By the way, we've got a Questions & Answers section in the forums, please post your questions in one of the threads there so that you get a quicker answer.