Yes, you need the Nintendo DS WiFi USB adaptor to access the internet.
no, usually if you have a router or a DS compatible access point you do not need a wifi usb stick
No you do not need wifi to go into the underground tunnles but you can use ds to ds action and play with your friends in the underground and trade and stuff.
You need a Wifi Connection or Wireless Connection just like a Nintendo Wii
sorry for the WNR2000v3
yes but you need a special cable that connects the ds into the wifi Gts
To get the jet you need to download it from a DS download station or go on WiFi. You will need 2500 points.
You just need a wifi connection
both are wifi.
You need to be in a WiFi Zone to upload coins. It wont work if you aren't in a WiFi Zone.
No, as long as your Nintendo DS can pickup a wireless connection, you can still connect to Nintendo WFC.
No you do not need a Wii, you need to have a broadband internet connection and a wireless router in your home, or find a Wifi hotspot such as McDonalds, Starbucks, Barnes and Nobles, etc. If you are using it at home and your router is secured (which it should be!) you will have to have that information to set up your DS wifi connection. Also take note that the original DS (also know as DS Phat) and the DS Lite only recognize WEP security, so if your using anything different you will have to change to that. The DSi and upcoming DSiXL/LL suporrt WPA in addition to WEP You can get complete information here http://www.nintendo.com/games/wifi/ds