All emulators allow game specific hacks/fixes. So what you describe can easily be recreated on an emulator.rembrandtqeinstein said:Emulators are your friend. Even if you have to violate copyright to download them and the roms that go in them, they are the only way to preserve gaming history.
But sometimes the emulators aren't good enough. For example all the old consoles had slowdown when lots of stuff was happening, and some games even took advantage of it. On newer systems the emulation runs so well there is no slowdown and the game isn't as playable (gunstar heros virtual console wii, I'm looking at you).