This monster was created by Obular to devolve humans into Apemen by biting them with his right arm and they themselves convert humans into Apemen. Because of its ability, Hihi Zuno attracted the attention of Arashi Busujima who beat the Zuno Beast into working for him in committing crimes. However, during Arashi's fight with Yusuke, Obular forces this monster back into serving him. Once blasted by the Biomotion Buster, with the Apemen restored to their original forms, this monster was reformed into a giant by Gash and destroyed by the Live Robo.