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Dr. Doppler is a brilliant Reploid researcher and the secondary antagonist of the video game Mega Man X3.

History

Doppler was a Reploid and an excellent researcher. He watched the war between the Maverick Hunters and Sigma, and hoped he could do something to stop this war. He created the utopian Doppler City, where all Reploids who were tired of the Maverick Wars gathered, with Dr. Doppler as their ruler. He studied the Sigma Virus, and successfully developed a anti-virus vaccine that he soon distributed among the denizens of his city. However, the anti-virus was a fake, and the Reploids start to go maverick in the city.

Doppler gathers an army of Mavericks and starts a full-scale attack against the Maverick Hunters base. X and Zero rush to the base to intercept the attack. X enters the base and finds Mac, who was a Maverick Hunter. He traps X and capture him, telling that he now worked for Doppler. Zero destroys Mac and rescue X, so the both of them goes to Doppler City to find Dr. Doppler and stop him. Doppler hires two police Reploids, Bit and Byte, and also revives Vile to hold off X and Zero.

X defeats Doppler's Mavericks and proceeds to his lab along with Zero. After defeating the fused Bit and Byte, as well as Vile, X finds Doppler and fights him. As x defeats the doctor, he recover his consciousness, revealing that he was being used by Sigma all along, having built a new and more powerful body for him. X then goes after Sigma and defeats him. When the viral form of Sigma tries to possess X, Doppler intervene by trapping Sigma within his own body, which contained the true anti-virus that he developed. X manages to escape while the lab explodes, as Sigma's code starts to vanish due to the anti-virus effects.

In Battle he shoots Green Orbs, and he generates a force field. The green Force Field absorbs any shots, and converts it into Health. You cannot get this weapon though.

Trivia

  • As with Mega Man X4, fans like to debate which of the two endings is the canon one, since there is no solid indication in the series. While Dr. Doppler hasn't made an appearance in subsequent games, his anti-virus technology seems to live on, most notably in Mega Man X5.
    • It is worth mentioning that if Zero uses the anti virus on Sigma, he says that he will come back. However, if Doppler is the one who destroys Sigma, he does not say so. This may hint that the canonical ending is the one where Zero destroys Sigma.
  • Dr. Doppler's name is a reference to the Doppler Effect and a pun on Doppler Radar.
Mega Man Villains
Main Villains

Bass | Bonne Family | Colonel Redips | Crimson Dragon | Dr. Cossack | Dr. Doppler | Dr. Regal | Dr. Weil | Dr. Wily | Evil Energy | Gate | General | Master Albert | Mavericks | Nebula Gray | Net Mafia Gospel | Nightmare Phenomenon | Red Alert Syndicate | Pseudoroids | Repliforce | Robot Masters | Sigma | Vile | Wily's Machines | World Three | X Hunters

Robot Masters

Air Man | Aqua Man | Arcade Man | Astro Man | Blade Man | Blizzard Man | Bomb Man | Break Man | Bright Man | Bubble Man | Burner Man | Burst Man | Charge Man | Centaur Man | Chill Man | Clock Man | Cloud Man | Clown Man | Cold Man | Commando Man | Concrete Man | Crash Man | Cut Man | Crystal Man | Dark Man | Dive Man | Drill Man | Dust Man | Dynamo Man | Elec Man | Fake Man | Fire Man | Flame Man | Flash Man | Freeze Man | Frost Man | Galaxy Man | Gemini Man | Gravity Man | Grenade Man | Ground Man | Guts Man | Gyro Man | Heat Man | Hard Man | Hornet Man | Ice Man | Jewel Man | Junk Man | Knight Man | Magic Man | Magma Man | Magnet Man | Metal Man | Napalm Man | Needle Man | Nitro Man | Oil Man | Pharaoh Man | Pirate Man | Plant Man | Plug Man | Pump Man | Quick Man | Ring Man | Search Man | Shade Man | Shadow Man | Sheep Man | Skull Man | Slash Man | Snake Man | Solar Man | Spark Man | Splash Woman | Spring Man | Star Man | Stone Man | Strike Man | Sword Man | Tengu Man | Time Man | Toad Man | Tomahawk Man | Top Man | Tornado Man | Turbo Man | Wave Man | Wind Man | Wood Man | Yamato Man

Mavericks

Armored Armadillo | Avalanche Yeti | Axle the Red | Bamboo Pandamonium | Blast Hornet | Blaze Heatnix | Blizzard Buffalo | Blizzard Wolfgang | Boomer Kuwanger | Bubble Crab | Burn Rooster | Chill Penguin | Commander Yammark | Crush Crawfish | Crystal Snail | Cyber Peacock | Dark Dizzy | Dark Mantis | Duff McWhalen | Earthrock Trilobyte | Flame Hyenard | Flame Mammoth | Flame Stag | Frost Walrus | Gigavolt Man-O-War | Gravity Beetle | Grizzly Slash | Ground Scaravich | Gravity Antonion | Gravity Beetle | Infinity Mijinion | Izzy Glow | Jet Stingray | Launch Octopus | Magna Centipede | Magma Dragoon | Mattrex | Metal Shark Player | Morph Moth | Neon Tiger | Optic Sunflower | Overdrive Ostrich | Rainy Turtloid | Ride Boarski | Shield Sheldon | Silver Horn | Slash Beast | Snipe Anteator | Soldier Stonekong | Spark Mandrill | Splash Warfly | Split Mushroom | Sting Chameleon | Storm Eagle | Storm Owl | Squid Adler | Sting Chameleon | The Skiver | Tornado Tonion | Toxic Seahorse | Tunnel Rhino | Vanquishing Gungaroo | Volt Catfish | Web Spider | Wheel Gator | Wild Jango | Wind Crowrang | Wire Sponge

Mega Man Classic

Darkloids | Devil Series | Doc Robot | Evil Robot | Gamma | Hyper Storm H | Jupiter | Mars | Mega Water S | Mercury | Neptune | Pluto | Saturn | Stardroids | Sunstar | Terra | Treble

Mega Man X

Berkana | Bit | Byte | Colonel | Double | Dynamo | Epsilon | Great Redips | High Max | Isoc | Lumine | Mechaniloid | Red | Silver Horn | Spider | Velguarder | Wild Jango

Mega Man Zero

Anubis Necromancess the Third | Aztec Falcon | Blazin' Flizzard | Blizzack Stagroff | Burble Hekelot | Childre Inarabitta | Copy X | Crea & Prea | Cubit Foxtar | Dark Elf | Deathtanz Mantisk | Devilbat Schilt | Elpizo | Fefnir | Fenri Lunaedge | Four Guardians | Glacier Le Cactank | Hanumachine | Heat Genblen | Herculios Anchus | Hyleg Ourobockle | Kuwagusta Anchus | Maha Ganeshariff | Mino Magnus | Noble Mandrago | Omega | Panther Fauclaws | Pegasolta Eclair | Phoenix Magnion | Poler Kamrous | Popla Cocapetri | Sol Titanion | Tech Kraken | Tretista Kelverian | Volteel Biblio

Mega Man ZX

Argoyle & Ugoyle | Bifrost | Buckfire | Fistleo | Flammole | Hedgeshock | Hivolt | Hurricaune | Leganchor | Lurerre | Queenbee | Rospark | Thetis

Mega Man Legends

Bola | Klaymoor | Lex Loathe | Megaman Juno | Mistress Sera | Servobots | Teisel Bonne

Mega Man Power Up

Copy Mega Man

Mega Man Battle Network

AirMan.EXE | Bass.EXE | BeastMan.EXE | BlastMan.EXE | BlizzardMan.EXE | BowlMan.EXE | BrightMan.EXE | BubbleMan.EXE | BurnerMan.EXE | CircusMan.EXE | CloudMan.EXE | ColdMan.EXE | ColorMan.EXE | CosmoMan.EXE | CutMan.EXE | Cybeasts | Dark MegaMan.EXE | Dark ProtoMan.EXE | DesertMan.EXE | DiveMan.EXE | Duo.EXE | DrillMan.EXE | ElecMan.EXE | ElementMan.EXE | FireMan.EXE | FlashMan.EXE | FreezeMan.EXE | GravityMan.EXE | HeatMan.EXE | JudgeMan.EXE | KnightMan.EXE | LarkMan.EXE | MagicMan.EXE | MagnetMan.EXE | PlantMan.EXE | PharaohMan.EXE | QuickMan.EXE | ShadeMan.EXE | SparkMan.EXE | StarMan.EXE | StoneMan.EXE | SwordMan.EXE | VideoMan.EXE

Mega Man Star Force

Andromeda | Cepheus | Crimson Dragon | Dr. Regal | Le Mu | Mr. King | Patrick Sprigs

Super Adventure Rockman

Ra Moon | Ra Thor

Rockman Strategy

Apollo | Aquarius | Aries | Cancer | Capricorn | Gemini | Leo | Libra | Luna | Pisces | Sagittarius | Scorpio | Taurus | Virgo

Non-Canon

Constellation Droids | Dimensions | Dr. Wily (Mega Man Fan Film) | Dr. Wily (Mega Man TV Series) | Origami Man | Proto Man | R-Shadow | Robosaur Park Dinosaurs | Slur | Vespor Woman