OK, I don't have a DS yet, picking one up on the 11th. But I have some questions. What the heck are friend codes? A link is fine if someone has one. If I know someone somewhere else, can I play against them if they give me the right info? Can I play against random people etc? I've read about them, mostly complaints, and I still can't figure out QUITE how they work. Maybe it would be really obvious if I actually had a DS but I guess I want to know before hand.