How are the codes for games supposed to be downloaded?
I plugged in the US version of MH3U but it says that there are no codes available even though there should be and when I plug in Pokémon X then it keeps looping between the cartridge not found and save backup tab...
I assume you have already registered your code and such?
You are also certain you have a US code (not EU code)? [this latter question is based on having scanned this thread. I guess some people were using a code for another country and reading the game disk was causing problems. Apparently code junkies will swap codes for you though, if you ask]