To request someone else's code, you first must add your own.
Friend Code Guide Step 1. Click My Friend Codes on the left sidebar. Step 2. At the top, you should see My WiFi Games and Settings. Next to that, there is a link that says Edit. Click that. Step 3. Scroll down in the list until you see Nintendo 3DS Code, Nintendo 3DS Code 2, and Nintendo 3DS Code 3. Enter your friend code, and submit! Note: If you don't have three 3DS's, you can copy & paste your friend code in all three of those boxes.