Also known as: ジャックシュタイン
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, [s]terrifying[/s] wormlike Candle head).
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".