DM_Melkhar
Where do you get the PoR friend codes from? I found out how to do it on Final Fantasy III and didn't know you could do it on Portrait of Ruin. It's a shame friend codes have to be from the same region for them to work. You'd think that since DS games aren't region coded it wouldn't be a problem, but alas it is!
If anyone's from the UK, I'll find my friend code and post it. I'm guessing most here are from the US though. It's in the second post. To recap, you have to logon to wifi at least once (either by using shop mode or co-op's wifi). then go to options and pick the save data you have used to go online. In the options menu go to the friend code option, and in there should be a tab labeled "confirm friend code." just click on that to see your own friend code.
Anyway I don't know where the majority is from. Some are from Canada, some are from the US some are from South America, it's kind of random. Although I wasn't aware you needed to register a certain regency's friend code... Considering rival's list can come from anywhere. If it's true that is kind of lame.