Things You'll Need
Instructions
Turn on your Nintendo DSi.
Tap the "System Settings" icon. This icon is in the form of a wrench.
Tap "Internet," located on the third page of the "System Settings" menu.
Tap "Connection Settings."
Tap "None," located next to "Connection 1."
Click "Search for an Access Point."
Select your wireless router from the list provided. Enter your router's WEP or WPA security key if prompted. Tap "OK."
Tap "Save Settings."
Tap "Yes." Your Nintendo DSi will perform a connection test. You are now able to use all of the online features of your Nintendo DSi while you are in range of your wireless router.