mobile is good for one thing and one thing only.

KILL TIME when your SUPER BORED and you have nothing to do. On a plane or in a boring class.

I hate mobile games but I will buy all of nintendos mobile games because for those 5-10 min a day I need a distraction it might as well be a from a good company that will use the cash to keep making mario/zelda/dk on the home consoles.

No, Nintendo's core audience is still on Nintendo consoles. The casual audience is on phones though. I'm guessing that the core audience will tear their hair out over Nintendo franchises on mobile platforms and keep playing on consoles, core customers won't suddenly dive into a completely different concept on a whim; they would seek something similar, if anything (as in, a different console).

Some handheld customers are bound to have shafted Vita and 3DS for mobile/tablet and simpler gaming though, but to state that Nintendo's "core customers" are now on mobile seems wrong to me.

I think animal crossing can be a good choice for smartphones, Mario paper, fire emblem...

But the other question is: is Nintendo can make a smartphone ?  Leaks speak about Nintendo Os for NX is Android frienly... And after all why don't take à part of smartphones games business ? Create the first HC/smartphone with innovation for control...

nintendoes core audience is 12 Million people out of almost 8 billion?

wii sold 100 million units.  

seems to meee 90 or so million went to mobile.

Their "core" fans hate mobile and avoid it like it's cancer and aids wrapped in a huge ebola tortilla shell. The "casual" fans that bought Wii weren't fans of Nintendo at all. They were just buying a status symbol... something that was "cool".

They weren't "fans" though. The majority of Wii sales went to people who didn't care or know anything about home console gaming. They were buying it because they wanted to be cool and have the latest buzz gear to show off at parties. They don't have any alliances other than buying the next "I own this thing which makes me cool... please love me" product. 

sounds like mobile gamers to me.  so the ppl who bought wii went to mobile and some grew up and went to ps4 x1. but we can't really tell since ps4 and x1 should do same numbers as ps3 xbox 360

It's hard to say just how big their core audience is, the Wii U seems to appeal only to a very limited number, even among the core. The vast majority of Wii owners were so called non-gamers or people with a smaller vested interest in video games. That was literally Nintendo's main strategy for the entire 7th gen; to draw in customers who didn't use to be customer in this particular market. These transitional audiences are not the core audience; they're in many ways the polar opposite, so "the Wii sold 100 million units" isn't really a good argument.

Yes; the majority Wii installed base likely went on to mobile and similar gaming, the core did not.

60M 3DS must mean nothing to you

Many of those people would not have bought a 3DS if Nintendo offered quality titles for mobiles.