This tech-recipe will explain how to locate your Nintendo 3DS WiFi MAC Address. Some of us that have wireless networks that use MAC Address filtering to add another level of security. This will allow you to add your new device to that list.
1. On your 3DS go to System Settings
2. Then go to Internet Settings
3. Then go to the Other Information and then Confirm MAC Address
4. You should now be able to write down your 3DS MAC Address and add it to your router/firewall.
