You go on a game that supports Wi-Fi then go onto Nintendo WFC settings (it will probably be in multiplayer). make a new wi-fi connection (it is easier to search for one click on the one that is your...
for ds and ds lite get a game with wifi connection and select the wifi setup, then search for an access point on one of the three slots. You have to have wireless internet to do this, or the Nintendo...
You have to have a wi-fi router and be in a wi-fi access spot. For example, most Starbucks have an access area. I believe you can get the wi-fi router at Sears or Gamestop for about $39.00. hope this...