Board Thread:Questions and Answers/@comment-11092596-20140820113607/@comment-4105472-20140820140103

Nintendo's Wi-fi has been discontinued only on Nintendo DS and Wii. He's talking about the GO games, which are only playable on Nintendo 3DS.

Well, you need to set up a Wi-fi connection in the settings of your 3DS. Honestly, you should search on Google, it'll help you a lot more than us.