Dr. Doppler

is a character and antagonist in the X era, serving as the main antagonist of Mega Man X3. He is a Reploid scientist who became famous for seemingly creating an antibody for the Sigma Virus, before becoming a Maverick himself and starting a rebellion.
Tall and imposing, Doppler resembles an elderly man with white hair turned upwards and a goatee. He wears a labcoat that hides his armored body, save for the dynamos on his shoulders.
==In the Games==
===Mega Man X3===
In Mega Man X3, Dr. Doppler's story is described in the opening narration. Using his Neuro Computer, Doppler found a way to suppress and eradicate all Maverick behavior in Reploids.Dr. Doppler's "Neuro Computer" is a detail added in the game's English localization, not present in the original Japanese. Neither version mentions outright curing the Sigma Virus. This attracted powerful Reploids to congregate around Doppler, founding a city called Dopple Town which seemed like a utopia. However, one day the Reploids of Dopple Town suddenly went Maverick and started a riot; the Maverick Hunters determined that Dr. Doppler was the mastermind, and X and Zero were dispatched to stop his Doppler Army.
Dr. Doppler is first seen in-person after two Maverick bosses have been destroyed, standing in his laboratory. He orders the Nightmare Police to capture X, before Vile MK-II declares he will pursue X on his own terms. Now alone, Doppler ponders how X defeated his "master" in the past, hinting at his allegiance to Sigma. In CD versions of the game, an FMV also shows Doppler constructing Sigma's new body.
Dr. Doppler later serves as the boss of Doppler Stage C. Before the battle, he offers X a place in his army once more, but when he rejects him, Doppler threatens to tear him apart and incorporate him into Sigma's new body. After the battle, Doppler is badly damaged but returns to his senses, revealing to X that Sigma infected him with the Sigma Virus to make him go Maverick and create a battle body for him. He then urges X to go stop Sigma.
If Zero is out of commission during Doppler Stage D, Dr. Doppler appears one last time. When Sigma's viral form threatens to steal X's body, Doppler breaks through the ceiling and traps Sigma using his own body. He tells X that he will use a Sigma Virus vaccine to destroy Sigma, self-destructing but allowing X to escape the burning laboratory.
=== Other Game Appearances ===
* In Mega Man X Legacy Collection, Dr. Doppler is a boss in X Challenge. He only appears in Vol. 1, where he is fought alongside Godkarmachine O Inary.
* In Mega Man X DiVE, Dr. Doppler appears as a card.
* In Rockman X3 Buster Battle, Dr. Doppler can be fought an opponent.
* In TEPPEN, Dr. Doppler appears in multiple Cards.
== Other Media ==
* In the Rockman X3 manga, Dr. Doppler reprises his role from Mega Man X3, though with some major differences. He is a former colleague of Dr. Cain, and uses Worms to infect and control Reploids in the Doppler Army.
* In Rockman X Mega Mission, Dr. Doppler serves as the main antagonist, and is the overarching antagonist of the entire Mega Mission Carddass series. Prior to Mega Man X3, Doppler created the Limited and the Incept Chasers, watching their battles with X and Zero from the shadows. Once X destroyed the Mother Limited, Doppler escaped to enact the events of Mega Man X3.
* In Rockman X Mega Mission 2, the remnants of the Mother Limited mutated and borrowed Dr. Doppler's appearance, creating the doppelganger Tackione. Doppler himself does not return, as this series is set after Mega Man X3.
* In Rockman X Giga Mission, an image of Dr. Doppler appears as Isoc uses his research to create the Extreme and his own Nightmare Police.
* In Rockman Remix, Dr. Doppler reprises his role from Rockman X Mega Mission.
== Official Data ==
=== Compendium of Rockman X ===
=== Mega Man X Legacy Collection Gallery ===
== Notes ==
==References==
Category:X era characters