For Pokemon related discussion, there's a board right here all for that! There's even a topic created specifically for Pokemon friend code requests, which is here.
For 3DS friends in general, you can make a new topic (and respond to other topics as well) here!
So yeah, check out all three of those links if you have the time. And after all that, don't be afraid to post and interact in topics! Because that's probably the best way to earn some extra 3DS friends! And online friends in general!
