I doubt nintendo would make an impact for mainland chinese. The reality is they never grew up with mario and zelda, they will look at these games like they would do with other types of games who look similiar.
Nintendo almost only made an impact in the first world during nes or snes days, in former communist countries they are even less know.

PG-13 movies can still be dark and violent and aimed primarily at teenagers/adults, studios just scale back the violence/sex just far enough so they can get away with a PG-13 rating. Nobody is confusing a PG-13 movie like The Dark Knight for Animal Crossing or Super Mario. 

There was a thread a couple of days ago. The PS4 is limited to 6 games per person. I am not sure if it applies to all consoles, that's something I pulled out of my ass.

I don't think it would. For one even if a Nintendo system was popular, it would be another drain on manufacturing, as Nintendo has shown, outside of Japan the main branch sucks at supplying when the demand and at time general market trends in their foreign markets. Understandable give the nature of manufacturing but extremely disheartening for those fans born and living outside of Japan.

Even given the proximity of Japan, I doubt the Nintendo would get that much of a boost, short of maybe releasing some unique super hardware like the iQue or whatever they dropped back in the N64/PS1 era, where it is more streaming device then normal home console.

GBA = 80 m
NDS = 150 m
Wii= 100 m
3DS=  52 (On its way to +70 m)

Nintendo is the only company that can be irrelevant selling like a beast.