
Doppler is impressed and irked by X's power. After X defeats two of the eight Maverick bosses, Dr. He also manages to sway the Hunter Mac to his side, getting him to kidnap X for him (though Zero thwarts the plan). Doppler launches an all-out assault on Hunter Base in their absence. Soon after X and Zero depart towards Dopple Town, Dr. He also began building a new, giant battle body for Sigma by stealing the data of the newest Reploid models. Doppler then became the leader of an army comprised of some of the most powerful Mavericks the world had ever seen and began waging war. It turned out that this "vaccine" was little more than a placebo, and more Mavericks were created as a result. However, at some point Doppler himself became infected with the Maverick Virus, resulting in him becoming an ambitious megalomaniac. He also created the fearsome Nightmare Police, Bit and Byte, who would help keep peace in the new city.

Doppler then helped build Dopple Town with the assistance of the seemingly-reformed Mavericks who congregated around him. Doppler became famous for having seemingly created a vaccine to the Maverick Virus using his advanced Neuro Computer. However, after his defeat he returned to his old self and felt remorse for his actions, even potentially sacrificing himself to defeat Sigma in a certain ending while stating that he could never really atone for what he had done to other reploids. He was a cunning strategist who studied X's battles and sent the Nightmare Police to hunt him, preferably alive so he could study his abilities a decision that was mocked by Vile who claimed that he was being too kind, Doppler showed confidence and annoyance telling Vile to watch his mouth. After becoming infected by said virus, he became dangerous and fanatically loyal to Sigma. He desired to help Mavericks reintegrate into society, and was working on a vaccine to cure the Maverick Virus.


Doppler was originally a selfless genius who wanted to improve the lives of both humans and Reploids alike. He normally wears a labcoat with holes accommodating the size of his shoulders, though he removes it for battle revealing his giant red shoulders.ĭr. Two large canisters or dynamos of some kind protrude from his shoulders, with tubes connected to his back and wires connected to a band on his forehead. Despite his apparent old age, he has an advanced Reploid body covered in grey and blue armor. Doppler resembles an elderly man with a curved white beard and a wild head of hair that flows upwards.
