[mrguyorama]

Nintendo has absolutely modified open source emulators for certain things

https://www.nintendolife.com/news/2021/05/nintendo_accused_o...

There has been accusations that some "in house" emulators are also open source ones with superficial changes

They have also been found to use ROMs dumped by end users and posted on the normal ROM sites for their "play an old game" products.

[ThatPlayer]

That article isnt about Nintendo, only a publisher on Nintendo's store.

The rom thing was only the same rom format. How are you going to tell if it's the same dumps or not? Roms are supposed to match 1:1, otherwise verification hashes projects like redump and no-intro wouldn't work.