Basically, to play over Wi-fi, you need to find a wireless access point for you to connect to. For example, if you have a Wireless Network at your house, you could get your DS to connect to that for Wifi. Most nearby food places/coffee shops also have wireless internet connections (McDonalds, Panera Bread, etc.)
Otherwise, if you have a broadband connection, you could get a Nintendo USB Wifi adapter from Gamestop and plug it into your PC.
« Last edited by RJ Fighter on Aug 20th 2006 »