Turns out that, Dirty Brother, Brother of Sans, Papyrus, Babybones, Prunsel, Disbelief, Will, Glart Cooper, Sup, Skele-ton, Has, 's been, Garbage brother and Bold the Skeleton ACTUALLY had a scrapped No-mercy run boss battle and i decided to upload it along with some custom battle mockup. 

I also checked some of its leftovers in the code, and despite Dirty Brother using his Dirtying mechanic ,you cannot be sent out of battle nor activate the Dirty route through this version.

Youtube Upload: https://youtu.be/HBDg6p-tv0k?si=cCLRujMUKdF-DhoB

https://www.reddit.com/r/Undertale/comments/1jyg07m/all_4_brothers/

Dirty Done Death

FROSTBUSTER

Hammer of Injustice (Battle Against Your Ears)

real song made by the real tonis fodxington for undertale 10th anniverserttey's dirty route

New tracks tagged #Deltarot