We don't have one of these yet on the site, so I took the liberty of making one if that was okay.
Each 3DS has one friend code that is used on ALL games. No more having a code each for every game you have (looks at Wii).

Post your FCs in this topic. Perhaps mention what 3DS games you are playing, too.

Phil: 1805-2338-1133
Tommy: 2062-8155-0752*
Link: 0559-7091-8681*

*same user

I'm a huge Zelda fan, therefore I have two 3DSs:
Tommy: 2062-8155-0752
Link: 0559-7091-8681 (my Zelda 3DS)
Will start playing MK7 soon.

Which 3DS do you use the most, or will you play MK7 on both?

I use the one named Tommy, and will actually be playing (and have been playing Kid Icarus: Uprising.