well b/c they get paid an amount of money for each one sold. P.s, you cant make a software for a game companies console and sell it in stores every where and not have mad deal with that company. BUT other things such as modded wiis that are sold 24/7 on ebay are a whole different concept.
why would nintendo make a software just for that. okay lets think... are they losing money by this in any way? no b/c if you by this you're just going to by a game earlier in japanese version.(such as brawl).
i really dont see any reason why they would make a software jusr for that. especially if theyre making proffite off of it.