Basically, on 4-1 (as example ; I'm sure it does the same thing on similar levels) with Music console: character Music set: character the music set depends on which map you're playing with. With Ryu NES or SNES, if you play with the SMB1 map, it plays 4-2. If you're playing with SML2, it plays 2-1. However, music doesn't change right as you change map. You have to trick around to make it play the right one. I tested the solutions to make it play the right music after having changed the map: Enter a pipe (or heaven coins) then come out Change music set to MAP Unpause Change back music set to CHARACTER Unpause Congratulations, it plays now the right music. EDIT: Yet the music does change properly when swapping ACTIVE SKIN.