There's not really much point in listing codes until they add the patch that lets people enter codes who didn't put one in as soon as they started. Because right now you either get someone to use your code right away (at Battle 2) or you're out of luck. That said, 00CBA6. Still hoping I'll get that random third code entry one of these days.
In the event friend codes start to work anytime before the event is over please feel free to use mine as well. 76039D