-Masked Rider Zero One Breaking Mammoth is transformed into satellite form and jet form mode! -In addition, the optional RKF Kamen Rider Zero One Rising Hopper can be boarded. -In addition, the breaking mammoth fangs can be removed and attached to the fist, and the optional progress key can be replaced. -For the Breaking Mammoth Progrise Key, press the button and touch the optional Hidden Zero One Driver, transform the Progress Key and load it on the belt! Kamen Rider Zero One transforms into a breaking mammoth! -Single play will light up and sound when you press the button! Expand the progression key and transform it into key mode!