jackenstein (deltarune)

A miniboss from chapter 4 of Deltarune. He's a large but cowardly and childlike Darkner with patchwork skin and a jack-o'-lantern head (in truth a mask covering a small, terrifying wormlike face).

Notable for his unconventional boss fight in which the player must collect treasure and a key in a maze to gain TP, and after picking up the latter must return to the entrance while a red jack-o'-lantern chases them after proclaiming "YOUR TAKING TOO LONG".