Horn Bone Mask was set up by Magman and the Black Cross Führer to lead a scheme to trick the Gorengers to give them the plans for "Franken #1", a new weapon devised by the French scientists for EAGLE to create a weapon that would withstand any Gorenger attack. The plan uses a special base where he disguises as a EAGLE officer, with a barrier to prevent Peggy and Asuka from escaping or contacting for help or being traced, even down to a voice manipulator for him or Magman to prevent them from contacting Gonpachi and gain authority to build them Franken #1; footage of Horn Bone Mask initially fighting Akarenger, Aorenger and Kirenger was also used to make them seem like the EAGLE threat was being managed. However when Peggy and Asuka finally catch on to being manipulated, they perform their