3DS only
if you don't know what a friend code is then do this:
Press HOME.
Click the orange face at the top of your bottom screen
Look at your friend card
In the bottom right corner of your friend card is your friend code (12 numbers)
Leave those number in the comments

To register a friend:
Press home
Go to the orange face
it'll say at the top of the bottom screen 'register friend'
click it and put in your friend's friend code.
name won't matter because it will change
#aswfriendcode