I had to look but there is a NES emulator that does sprite replacement which is interesting: https://github.com/mkwong98/HDNes https://github.com/mkwong98/HDNe

I had to look but there is a NES emulator that does sprite replacement which is interesting: https://github.com/mkwong98/HDNes https://github.com/mkwong98/HDNes https://www.youtube.com/watch?v=N57ApspYHVE https://www.youtube.com/watch?v=N57ApspYHVE