Rainbow Devil (レインボーデビル Reinbō Debiru?) is a boss from the Mega Man Zero series. The Cutting Shadow Squadron's secret weapon, the Rainbow Devil's body is made of a liquid metal that constantly changes colors. Its core, a Pantheon head, controls the body and can change it into any form. Attacks sink into its body, rendering all but the most well-placed attacks to its core (its only vulnerability) useless. The details of the Rainbow Devil's construction are unknown, but it is rumored that he was derived from lost data of ancient times.