This is a graphical facelift for Mario Bros., which gives the game a more modern look to it.
Version 1.2 fixes the patch file to generate a ROM file instead of an archive file. The region flag in the header has been fixed, as well as a reset bug present in the original game.
ROM / ISO Information:
Database match: Mario Bros. (Europe) (PAL-MC-0, Classic Series)
Database: No-Intro: Nintendo Entertainment System (v. 20210216-231042)