Cuphead's appearance at E3 2014 features an unused boss referred to by fans as the "Demon Bat". It is unknown why this boss went unused, but it's most likely that the developers decided that certain phases from the Demon Bat's fight may have fit better with another boss in the game, as this design philosophy was mentioned in an IGN interview. This is evidenced by Djimmi the Great's third phase in the final game, where he transforms into a sarcophagus and spawns minions to go straight for the player, being nearly identical to one of the Demon Bat's attacks in a pre-release screenshot from E3 2014. Another underlying reason the boss may have been scrapped is due to its pink lips and black skin unintentionally resembling offensive blackface characters from the cartoons Cuphead was inspired by.