All Nintendo First Party 10 Million Sellers (as of December 31, 2023) (+Poll) UPDATED WITH LISTS BY RELEASE YEAR & CONSOLE

[PAOerfulone]

Breath of the Wild 2
Brilliant Diamond/Shining Pearl
Mario Party Superstars
Legends Arceus
Splatoon 3

That's at least 5.

Mario Maker 2 and Bowser's Fury will get there eventually, so 7.

And I'm almost certain we're going to get at least 1 more 3D Mario game and/or Pokemon Gen 9 at some point. So when those drop, that'll be 8-9.

So it'll be either 60 or 61. Because I could easily see them saving the next 3D Mario for Switch 2 so that Switch 2 has that game + Mario Kart 9 in the first year, with one of them being a launch title.