How to Set up Wi-Fi for the Nintendo DS

You can play online-capable games with other players from anywhere in the world on your Nintendo DS. Simply connect your Nintendo DS to a Wi-Fi connection by following steps below, and you'll be gaming online in no time.

Insert an online-capable game into your Nintendo DS [source: Jordan].
Turn on the system and access the game's main menu.
Select Nintendo WFC. If you don't see that option, check the game's manual for more information.
Touch the option on the screen to enter the Wi-Fi connection settings [source: Nintendo].
Locate the three connections where you can save different settings. If your Nintendo DS has already been connected to a Wi-Fi network for one or more of the settings, those settings will say Ready. Any settings that have never been used will read None [source: Jordan]. If there is already an existing connection that isn't working or if you just want to clear out the old connections and start fresh, touch Erase Settings [source: Nintendo].
Select one of the empty connections to access the settings [source: Jordan].
Tap Search for an Access Point on the Connection Settings screen. Your DS will search for any wireless networks in the area [source: Nintendo]. The list will include the network's name, signal strength and security status [source: Jordan]. Unsecured networks will have a blue padlock in an unlocked position. Networks with WEP security will be signified by a locked red padlock. You'll have to enter a security key to access these networks. A gray locked padlock indicates WPA security, which isn't compatible with your Nintendo DS.
Connect to an unsecured network by touching OK, Save Settings and then Yes after tapping the network name.
Unlock a red padlock by tapping the network name. Enter the WEP security key into the empty field and select OK. Touch OK again, Save Settings and then Yes [source: Nintendo].

You're ready to play online with your friends!