That depends. First, you need hi speed internet...I think

Do you have a wireless router? If so, you should be able to connect, but may need to find your PC's WEP ID or something like that (probably didn't call it the right thing, but you can go to Nintendos site to Wi-Fi help to find out), and enter it to get it working. Your PC speed may need to be set to something different as well, but Nintendo's site can help you out.
If you don't have the wireless router, like us, you need to buy the Nintendo USB connector. I think it is like $35 and when I got it, I had to order it through Nintendo online, but I saw it at Target the other day, and I think Best Buy has it too. That, you just hook up to your PC and it enables your DS to connect via Wi-Fi. It really is worth the money to do
