If Mario were a system seller, NSMB U would be selling WiiUs right now.
The NSMB series have never been system sellers. On the other hand, they have long legs, so they sell when people HAVE the consoles, not sell THE consoles. (And let's be honest, as fantastic as NSMBU is, people won't buy a console for a game that looks like what they played before.) This is evident by the attach rate.
3D Land sold more 3DS's than NSMB2 by far.
Even the fan reaction to SM3DW was weak.
Did you miss the latest trailer? The reaction is through the roof right now. People judged too quickly and now they're apparently gladly eating crow.
I actually think Pokemon X&Y would be AMAZING on WiiU.
- 1080p graphics. Just up-render, and re-texture as needed (but I am sure Nintendo already has high-res textures for everything)
- ability to manipulate camera freely with right control stick
- full 3D models for the entire game. No chibi.
- more detailed character customization, maybe like in Animal Crossing.
- better online functionality with Nintendo Network.
And then you'll lose the main feature that Pokemon is designed around:
Portability. And frankly, the only thing a console Pokemon would really bring that is nearly necessary is a much improved frame rate.
It's been said many times that Pokemon won't work on consoles (Even the console Pokemon games had to change the design point of the games, like how Colosseum/XD were made to be more traditional RPGs.), so I won't repeat things that have been said many times.