You have to go to a Pokemon Center, and in the basement they will give you a pal pad. In your key items, use the pal pad and it will say your friend code, and then you can register others. After you have registered somebody and they have registered you, go to the person who is beside the swing door in the basement of the pokemon center talk to them, and enter wifi connection. (WIFI settings can be set on the screen where you choose to start a new game or continue playing) Then, you basically select trade or you click on the person you are trading with if they have selected trade. Hope that helped.