Western Third party support will only come if the system has great sales and is somewhat easy to port to without too many unique Nintendo exclusive extras. But releasing a system like that will net Nintendo nothing and what support they do have won't be able to compete head to head with Xbox One and the PS4 in the long run short of a miracle. So I am guessing if the system has great sales, but some unique Nintendo exclusive feature whether it is a hybrid portable-home console system or whatever, Nintendo will at best only get some third party support from Japan and a few indies.

If the NX turns out to have decent enough hardware I dont see why not?

I don't think thirdy party don't appeal to Nintendo fans. The fans keep buying the consoles DESPITE losing all thirdy party content. The customer that don't want to lose thirdy party games stopped buying Nintendo consoles since the N64. That's why Nintendo's share eroded: they lost a big chunk of potential public. With the Wii, they gathered a different public with casuals. They ended up losing them to smartphones.

If they want to sell well, they need to get back this public by receiving a steady and thrusty 3rd party support. And that means making everyone sure that the NX will get ALL games. To achieve that, they will need to offer advantages for the softhouses to get support. Like lower royalties or something like that.

They won't get decent sales without that, unless they find a niche again and that's hard. Their performances with the NES and SNES were fuelled by third parties. They lost them and lost share. They managed to keep things going with portables because they are usually secondary devices to a home console and also because thirdy party games are weaker in this segment.

Only if the NX is your traditional console and selling well then I can see 3rd party support flooding in.

Possibly, but I don't think Nintendo NEEDS 3rd party support to survive. Their IP alone accounts for numerous comparitive IP at many studios combined. And their software sells very well. However, In order for their content to reach a wider audience, 3rd party games are needed to increase the install base of a console. That is unless, Nintendo pulls another Wii with NX in which the technoloy is "must try" tech. Which, isn't too farfetched. We haven't seen any console that's been kept such a secret. Current developers know nothing about it, even OS engineers at Nintendo don't know what the NX is. If NX becomes must try technology, they won't necessarily need 3rd party support but 3rd parties would be obligated to make software for it if the console explodes.

It could get 3rd party support if it does 2 things.

1. The console sells very well.

2. Games are easy to port to it.

If they manage to do both, I don't see why it can't get 3rd party support.

Only if it's a huge success.

But that won't happen so no, it will only have a couple of JP multiplats but that's about it.

I wish it was a success though, so Nintendo doesn't give up mid-gen and actually releases worthy games instead of the low effort safe sequels Wii U got.

I want Animal Crossing, Fire Emblem, Golden Sun, Metroid, 3D Donkey Kong, a real Paper Mario, etc... GO CRAZY

3DS has good third party IMO and I don't see why it's sucessor wouldn't have.

If the thing is suxcessful third party companies will certainly support it but to be 100% shure it must be a powerful console...

No. But they can get their support, they just need a console with 40X processing power and 320 TB of RAM.