What really sticks in my craw regarding the 3DS Powersaves device is that Codejunkies created badge-enhancing codes for the European version...but REFUSES to do so for the American version!
This, despite my repeated requests for such codes, including what I call a "request bomb", that is, I request the same exact code(s) several times in a row, in rapid-fire fashion.
I've even been forced to directly address such a discrepancy in the American code list for Smash Bros. with the support team via email! I'm still unsure whether it will 1. receive a reply, and 2. do any good.