Jacks are enemies fought in the Run 'n Gun level Funhouse Frazzle from Inkwell Isle Two. These creatures will appear from above or below during the last section of the level. They spin around in the air and will slowly come toward the Cuphead/Mugman. It takes one shot to defeat them. As the name says, jacks are small mint or pink knucklebones consisting of six points with four knobs that act as eyes. If you can't wait to see them in the game, you can meet them in our fanart Cuphead Green and Pink Jack cursor pack!