Now, clicking on a link to Bimmy shows “This app is currently not available in your country or region.” This time, it wasn’t Apple that removed it but the developer. Over on MacRumors’ forums, the developer said it pulled the app “out of fear.” “No one pressured me to, but I got more nervous about it as the day went on,” it wrote.
Using leaked source code or binary firmware blobs are other common reasons emulators can violate copyright. I don’t know if this emulator did any of those.
I highly doubt it. The NES has been completely reverse engineered for decades, there really isn’t any reason to use proprietary code for an emulator for it.
The NES is the most basic possible architecture you could imagine. There’s no source code to be leaked here, there’s nothing you would even call a BIOS.