Super Mario Bros. Gold Edition (SMB1 Hack) - Side B
Hack developed by szemigi. Click show more to get link.
"Super Mario Bros. Gold Edition is a compilation of Super Mario Bros. and Super Mario Bros.: The Lost Levels including features from both games, but also new features as well. This is also a respond/tribute hack to Shane M.’s “Super Mario Bros.: Double Trouble” FDS hack."
So... Yeah. This is Side B hack... Almost the same as Side A, but with Luigi using some (loose) lost level physics.
Get the patch here: https://www.romhacking.net/hacks/3890/