Demographic studies suggest that most of the Wii U's audience is males in their middle 20-30s.

Nintendo gamers are very discerning in terms of quality, but also supportive of developers that try new and interesting things. Mario, Link, and Samus, are characters that lure us in out of nostalgia, but aren't pre-requisites for buying a game. It's more about the perception that a lot of time, effort, and thought was put into the product we are buying. This may be the reason that many of us don't play a great deal of multiplats, even on our PS4s and XBOs. We are an audience used to being given a singular product that has been meticulously polished for one partcular console. All of my Wii U games are exclusives, and most of my PS4 games are as well. 

You cant travel back in time so your idea wont work. 

Btw. the wii u got alot 3rd party titles at launch (and alot more announcement of games which never got released). It still failed.

What you're saying is so false, I don't even know where to begin. Nintendo PROMISED third party support to get ramped up showing names of third party devs and nothing came after E3 that even resembled  that promise.

2 batman games 

2 cods

2 assassins creed games

mass effect

need for speed

Fifa, Madden, NBA

Darksiders

Tekken

And even more, mostly launch titles. That was a very good third party support, ps4 and xbox one didnt launched with more titles. They just didnt port more games scince all these games sold ~0,1-0,3m.

Killzone Shadowfall on Ps4 sold 2,23 Mio copies but advanced warfare sold 6.5 mio copies (ghost 3 mio). 

So both multiplatform cod shooter on ps4 sold more as the exclusive you cant get anywhere else.

On Xbox One Titanfall sold 2,6mio copies (xbox exclusive) but cod:aw as a multiplattform sold 4,4 mio copies.

Pretty much does disproves what you said. Splatoon doesnt sell that good because its exclusive. It might sell a bit better because its exclusive, but not that much. Check devils third sales in some month and you will see that this exclusive shooter will sell alot less then splatoon, even if both are exclusives.

Splatoon does sell that good because its what the wii u audience want to play. A cartoony fun looking game that can be played by kids. If splatoon would had realistic graphics you could be sure you would see similar sales as bayo2.

Did you watched the nintendos world championship? There was a little kid commentating as they palyed splatoon. Those kids are the main audience that do play splatoon and that does play on wii u. They will never buy a bayonetta 2, as call of duty or assassins creed game.

What you're saying is so false, I don't even know where to begin. Nintendo PROMISED third party support to get ramped up showing names of third party devs and nothing came after E3 that even resembled  that promise.

2 batman games 

2 cods

2 assassins creed games

mass effect

need for speed

Fifa, Madden, NBA

Darksiders

Tekken

And even more, mostly launch titles. That was a very good third party support, ps4 and xbox one didnt launched with more titles. They just didnt port more games scince all these games sold ~0,1-0,3m.

Quit that nonsense. I can't stretch how stupid it is to say X game is selling because of artstyle. Splatton is selling because it's awesome. if the artstyle was different but the game was pretty much the same, sales would be very similar.