So long story short, I'm tired of the old battle theme in mvsl. I was making this mushroom themed level and wanted the athletic theme to play, but mvsl only supports the two songs. I personally dont care about butchering the music, the sole purpose of this rom I'm editing is for mvl, not by any means single player. For all I care the whole game could break, just so long as mvsl works. So any solutions to this?

it is possible in shadeys21 co op hack it had the feature but he hasn't made a tutroul on it but if you want to know what im talking about see here https://youtu.be/mLbrOjX8Mp8

 TheGameratorT has made an ASM hack for this. I could direct him here as I'm not sure if he's released it yet. If you were interested, you could join the MvsL Hacking Discord I have in my signature for any future help or questions about MvsL hacking
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Here's my MvL Hacking thread

Consider joining the NSMB DS Hacking Discord Server!

#HakingNoMore