Let Me Tell You About This Cup

The Devil tells his first (and later second) finest demons about the times he and Cuphead clashed over the latter's soul, mentioning the events of Carn-Evil, Roll the Dice, and the Sweater Duology in which the Cup lost his soul in Soulball, though Mugman got it back and tricked Old Scratch into destroying his own carnival, his incompetence on King Dice's Roll The Dice show despite it being impossible to lose and then that invisible impenetrable sweater made with brotherly love by Mugman, the latter two of which causes him to accidently kill his demons with his temper over Cuphead not naming Twinkle Twinkle Little Star and the sweater itself.

Example of:
Continuity Nod