Reploid

Reploid is the given name to the type of robots that inhabit the X and Zero series. The first Reploids were created by Dr. Cain in his attempt to replicate the work Dr. Light had completed with Mega Man X. X and Zero are not Reploids due to the fact that they are originals (created by Dr. Light and Dr. Wily respectivily) but have been referenced as Reploids in the games. Reploids play a larger role in the events of the Mega Man Zero series and Mega Man X4.

Like X, Reploids possesses a free will and the capability to think, feel and make his own decisions. But unlike Dr. Light, Dr. Cain don't tested them, what allowed the Reploids to go Maverick.