In the NES version of Mario Bros., Mario and Luigi dont look like they do on the arcade version, so here is a hack that makes them look like it! All of Mario/Luigi's sprites have been altered look more like the arcade version, and Luigi even has his pallet without messing up the koopa palletes!
Database match: Mario Bros. (Europe) (Rev B) (Classic Series)
Database: No-Intro: Nintendo Entertainment System (v. 20180803-121122)
File SHA-1: CC660BAA474BAAADCFCE5C502B5A119AB07158E7
File CRC32: 46B2C0DE
ROM SHA-1: DBD1BF833A9D89A9AC41CCCED0FB508074A489D1
ROM CRC32: A1C0DA00