Go to the downstairs of any pokemon center and talk to the lady at the counter at the end. She will give you a Pal Pad if its the first time on wi-fi. Then, when you obtain the Pal Pad, you can register peoples friend codes. When you do that, go to the downstairs of any pokemon Center and talk to the lady at the end. She will let you in. And the people that youve added to your Pal Pad will be displayed on wi-fi if they are currently on wi-fi.