A new fan-made project has successfully ported the original Super Mario Bros. to the Game Boy Color, titled Super Mario Bros. Mini. Developed by homebrew developer Mico27, this version of the classic NES game includes several exciting enhancements and new features that expand upon the original experience.
Even Nintendo starts with a cease and desist. Get that rom out there, and nobody will give a shit how shady the site or discord they download it from is. :-)
I already have it, and the source code. It’s too late for Nintendo.