User blog comment:Plexioth- xD/Monster Hunter 3 Ultimate/@comment-187979-20111218231815/@comment-76.69.7.125-20111218233524

This has been posted and discussed already. If you see the entire transcript (which is available in English on Nintendo's Japanese website), you'll see that he's not talking about localization of Monster Hunter at all.

Instead, he's saying that Monster Hunter is a killer app for the teenage market in Japan, but there's no similar game in America - Monster Hunter isn't the biggest game over here, and the 3DS doesn't have Call of Duty or anything like that. What Iwata was saying was that Mario itself can serve as a killer app in America because it's more popular with the teenaage market in Japan.

The person who wrote that article was bending Iwata's statements in a weird way. It's actually pretty clear that Iwata wasn't talking about Monster Hunter's localization.