NSMBU is the main pack in game, think of Wii Party U + Wiimote as just an extra throw in.

Wii Party U/Wii Fit U probably didn't have very large development costs, which is why Nintendo is more willing to give those away in a bundle.

I could be wrong but I think this is the first time Nintendo has bundled a Mario game with a Nintendo console in Japan. Usually Nintendo never does that in Japan, but desperate times call for desperate measures. 

The 2014 delay will really bite Sony in the a.. in Japan. Releasing a new console in February isn´t exactly a brilliant idea. The excuse has been that the games wouldn´t be ready but it´s launch lineup next year is still looking pretty lackluster.

Nintendo will have a decent holiday season this year in Japan.

Sony knows the console business is Japan is small potatoes these days. Better to push as much stock to the more important US/Euro markets and try to take as much advantage of that lower PS4 price over the XB1 as possible. 

The Wii/Playstation audiences in Japan are pretty different anyway ... the Wii appeals to families, kids, and Nintendo fans, the Playstation is more aimed at teenagers/college kids/otaku nerds and neither is really going to stop the other from having their fans eventually buy the consoles.The battle between the XBox 1/PS4 in the West will be far more intense. 

I think Sony made the right call. 

LOL, you are acting like the majority of gamers cares for power alone. The problem of the Wii U isn't how the software looks, it's that there isn't much that isn't available on other systems right now. Power was also the final nail in the coffin for the 3DS, the DS, the Wii according to people like you. It's funny how Sony started only with the power argument cause Xbox came in. And now people act like it was always this way.

if you wanted arguments you should have read my objection quote. I won't repeat myself to one who refuses to accept the truth.

This is really just an excuse . PS4 will be even released in other Asian countries this year.

The real reason in my opinion is that Sony is desperately trying to revitalize PSV in Japan, and therefore placing their bets on PSV2000, PSV TV, this holiday season and FFX/X-2 which releases 19th Dec..

I actually think the inclusion of Wii Party is a pretty big deal.  First off, remember that Wii Party was very popular.  About 8 million in sales.  Secondly, Nintendo NEEDS to show that the Wiimote/Gamepad multiplayer is worthwhile to consumers.  They tried to do this with Nintendoland, but that didn't quite work out, so Wii Party is trying to fill that void.  Mario is obviously the bigger draw, but Wii Party U isn't just a throwaway.  It's an important game for Nintendo.

Stop putting words in my mouth. I haven't said PS4 lineup is "awesome", just that it will have more games in a short time and thus Wii U will not be a better option for either near or far future.

There is quite a difference between 0% and 20%, the difference is "no reason to buy this console" vs. "quite a few reasons to buy this one". Any number of next gen games is better than 0 next gen games. What is more, there is a difference between the quality of the ports on PS3 and PS4 (one look at Watchdogs or ACIV on both platforms is enough). There is next to no (if any at all) difference between PS3 and Wii U ports. So yes, that makes a huge difference even with cross-gen games.

go Nintendo go! you got the attention of the haters, casuals should be next!

Nintendo is getting aggressive with the bundles, which is very good. This bundle should come to the west, it will help a lot.