Convert APK to NES

There is probably no way how Android apps installation packages (.apk) could be converted to ROMs (.nes) used by emulators of Nintendo Entertainment System and you won't find some apk to nes converter on the Internet. Even the opposite conversion does not seem very likely, but at least NES ROMs can be emulated on Android using a special emulator app.

Simply put, it is impossible to convert APK to NES directly.
Thus, there is no so-called apk to nes converter or a free online .apk to .nes converter to be found.