Router: Go onto Pokemon DPPt and go to Wi-fi set up on the menu. Go to search for more than one access point and it may come up with a result. Touch it with your stylus/pen. If it has a lock next to it, you won't be able to connect, and you'll need to unlock it. If it isnt locked, your DS will test it. If it succeeds... Go to GTS, battle tower, or the bottom of Pokemon centres and you can use Wi-fi!