The console which going to have good first party AAA games,all the third party games,all indie games and all the Japanese games going to dominate this holiday and this year.

That's a given already. Pokemon GO was too popular to ignore. Nintendo will try to drag those customers into the main titles. Pokemon Go was more of less designed to do so.

Smash is bigger than 3D Mario, I'm not sure why you think it can't carry a holiday.

Usually, but then Odyssey isn't selling like a 3d mario game.

And what happens when Smash doesn't sell like a typical smash game? 

I believe the word you're looking for is "If".

Just assuming the Switch effect will impact smash aswell. 

I'm not sure. I think many people are underestimating the combined effect of spiderman, kh3 and rdr2. It all depends on how aggressive Sony will be during this holiday season. Switch and PS4 will probably be close, but a good price cut for the ps4 slim may do wonders. Also, I'm still not convinced that pokemon let's go will appeal to many of those who downloaded the (free) game on their smartphones. I guess we'll have to wait and see. Still, neither Sony nor Nintendo will dominate the holiday season. They'll both do great.

They said the 2019 games will be more “traditional” no GO intergration, but I can totally see that changing if Let’s Go ends up outselling previous main core games.

i expect sony to announce a price cut, and possibly a PS4slim