Devil's Gambit but everyone sings it

Credit all nightmare modes (Except for Cuphead) are by ‪@tbizzleandfriends9449‬ that includes SH Mephisto (or however you spell it)
Main mod
gamebanana.com...
OST
• Devil's Gambit (Ft. Sa...
Characters
Nightmare Cuphead
BF
Nightmare IHY Luigi
IHY Mario
Nightmare Turmoil
Ink Bowser
Nightmare Horror Mario
Killie Sweets
Nightmare 2011X
M.exe
Nightmare Rewrite (Owned by ‪@springlessmusic‬)
Lilabelle (Owned by ‪@bouncy2D‬)
Nightmare Mr.L (Owned by ‪@MrPixelProductions‬)
Berserker Mario (Owned by ‪@dorkly‬)
Nightmare Devil Mario
Super Bad Mario (Owned by ‪@pastek366‬)
Nightmare Yourself
TMK (Owned by ‪@MapleRiot‬)
Nightmare Fatal Error
Kirbo (Owned by ‪@TerminalMontage‬)
Nightmare MX
Somari
Nightmare Kilobyte
Pixelcraftian Mario (Owned by ‪@Pixelcraftian‬)