TL;DR: Nintendo use a MIT licensed code.
But they did use the code. So MIT/BSD work?
A big chunk of WebKit is LGPL and Blink too as a consequence. They might be successful thanks to that too.
Honestly, I don't find your obvious so obvious.
What tends to be ignored is attribution, respect to Nintendo for having good internal processes in this regard. If there is any news here, it’s that.