Dr. Cossack

Mega Man Classic
Dr. Wily | Dr. Cossack | Dark Man | Bass | Treble | Reggae | King | Ra Moon | Ra Thor | Quint | Mega Man Killers ( Enker | Punk | Ballade ) | Stardroids ( Mercury | Venus | Mars | Jupiter | Saturn | Uranus | Neptune | Pluto | Terra | Sunstar ) | Buster Rod G | Mega Water S | Hyper Storm H | Mega Man? | Doc Robot | Evil Robot/Trio | Evil Energy | Fake Man | Roboenza | Met | Sniper Joe | Devil Series | Gamma
Robot Masters ( Cut Man | Guts Man | Elec Man | Ice Man | Fire Man | Bomb Man | Time Man | Oil Man | Bubble Man | Air Man | Quick Man | Heat Man | Wood Man | Metal Man | Flash Man | Crash Man | Spark Man | Snake Man | Needle Man | Hard Man | Top Man | Gemini Man | Magnet Man | Shadow Man | Ring Man | Dive Man | Skull Man | Pharaoh Man | Bright Man | Toad Man | Drill Man | Dust Man | Stone Man | Gravity Man | Crystal Man | Charge Man | Napalm Man | Wave Man | Star Man | Gyro Man | Blizzard Man | Wind Man | Flame Man | Plant Man | Tomahawk Man | Yamato Man | Knight Man | Centaur Man | Spring Man | Freeze Man | Slash Man | Cloud Man | Junk Man | Turbo Man | Burst Man | Shade Man | Astro Man | Frost Man | Sword Man | Grenade Man | Clown Man | Aqua Man | Tengu Man | Search Man | Cold Man | Burner Man | Pirate Man | Ground Man | Magic Man | Dynamo Man | Concrete Man | Jewel Man | Hornet Man | Tornado Man | Plug Man | Galaxy Man | Magma Man | Splash Woman | Blade Man | Solar Man | Sheep Man | Chill Man | Commando Man | Nitro Man | Strike Man | Pump Man )
Mega Man X
Sigma | Vile | X Hunters ( Serges | Violen | Agile ) | Zain | Geemel | Dr. Doppler | Bit | Byte | Berkana | Gareth | Mac | Double | Colonel | General | Dynamo | High Max | Gate | Isoc | Red Alert Syndicate | Red | Lumine | Epsilon | Spider | Colonel Redips | Sigma Virus | Zero Virus | Nightmare Phenomenon
Mavericks ( Launch Octopus | Chill Penguin | Flame Mammoth | Boomer Kuwanger | Sting Chameleon | Spark Mandrill | Storm Eagle | Armored Armadillo | Wire Sponge | Morph Moth | Flame Stag | Magna Centipede | Overdrive Ostrich | Bubble Crab | Wheel Gator | Crystal Snail | Blast Hornet | Blizzard Buffalo | Gravity Beetle | Toxic Seahorse | Volt Catfish | Crush Crawfish | Tunnel Rhino | Neon Tiger | Web Spider | Cyber Peacock | Storm Owl | Magma Dragoon | Jet Stingray | Split Mushroom | Slash Beast | Frost Walrus | Grizzly Slash | Squid Adler | Izzy Glow | Duff McWhalen | The Skiver | Axle the Red | Dark Dizzy | Mattrex | Commander Yammark | Rainy Turtloid | Shield Sheldon | Blizzard Wolfang | Blaze Heatnix | Infinity Mijinion | Metal Shark Player | Ground Scaravich | Soldier Stonekong | Tornado Tonion | Splash Warfly | Flame Hyenard | Ride Boarski | Snipe Anteator | Wind Crowrang | Vanquishing Gungaroo | Earthrock Trilobyte | Gigavolt Man-O-War | Avalanche Yeti | Burn Rooster | Bamboo Pandamonium | Optic Sunflower | Dark Mantis | Gravity Antonion | Wild Jango | Silver Horn | Dr. Psyche | Incentas | Shadow | Botos | Ferham | Scarface )
Mega Man Zero
Copy X | X Guardians ( Harpuia | Fefnir | Leviathan | Phantom ) | Elpizo | Omega | Crea & Prea | Dark Elf | Dr. Weil | Kraft
Mutos Reploids ( Aztec Falcon | Anubis Necromancess the Third | Maha Ganeshariff | Blizzack Stagroff | Hanumachine | Herculios Anchus | Hyleg Ourobockle | Poler Kamrous | Phoenix Magnion | Panther Fauclaws | Kuwagusta Anchus | Burble Hekelot | Blazin' Flizzard | Childre Inarabitta | Devilbat Schilt | Deathtanz Mantisk | Cubit Foxtar | Glacier Le Cactank | Volteel Biblio | Tretista Kelverian | Noble Mandrago | Heat Genblen | Tech Kraken | Pegasolta Eclair | Popla Cocapetri | Sol Titanion | Fenri Lunaedge | Mino Magnus )
Mega Man ZX
Model W | Prometheus | Pandora | Serpent | Aeolus | Atlas | Thetis | Siarnaq | Master Albert
Pseudoroids ( Hivolt | Fistleo | Lulerre | Purprill | Hurricaune | Flammole | Leganchor | Protectos | Buckfire | Chronoforce | Rospark | Vulturon | Queenbee | Bifrost | Hedgeshock | Argoyle & Ugoyle )
Mega Man Legends
Bonne Family (Tron Bonne | Teisel Bonne | Bon Bonne | Servbots) | Megaman Juno | Glyde | Birdbots | Bola | Klaymoor | Mistress Sera | Lex Loathe
Mega Man Battle Network/NT Warrior
World Three ( Lord Wily | Mr. Match | FireMan.EXE | HeatMan.EXE | Ms. Madd | ColorMan.EXE | Count Jack Zap | ElecMan.EXE | Yahoot | MagicMan.EXE | BombMan.EXE | StoneMan.EXE | Takeo Inukia | BeastMan.EXE | Noboru Sunayama | DesertMan.EXE |BubbleMan.EXE | DrillMan.EXE | Rei Saiko | FlashMan.EXE | Anetta | PlantMan.EXE | Joe Mach | BlastMan.EXE | Blackbeard | DiveMan.EXE | Yuika | CircusMan.EXE | Vic | ElementMan.EXE | Prosecutor Ito | JudgeMan.EXE ) | NetMafia Gospel ( Sean Obihiro | FreezeMan.EXE | Magnus Gauss | MagnetMan.EXE | Arashi Kazefuki | AirMan.EXE | Speedy Dave | QuickMan.EXE | Dark Miyabi | ShadowMan.EXE | Princess Pride | KnightMan.EXE | CutMan.EXE ) | PharaohMan.EXE | Dr. Regal | LaserMan.EXE | Nebula | Darkloids ( ShadeMan.EXE | BurnerMan.EXE | SparkMan.EXE | VideoMan.EXE | BowlMan.EXE | GravityMan.EXE | BrightMan.EXE | SwordMan.EXE | ColdMan.EXE | StarMan.EXE | CosmoMan.EXE | LarkMan.EXE | CloudMan.EXE | BlizzardMan.EXE | Dark MegaMan.EXE | Dark ProtoMan.EXE ) | Duo.EXE | Cybeasts | Bass.EXE
Mega Man Star Force
Cepheus | Andromeda | Dr. Vega | Le Mu | Mr. King | Crimson Dragon
Non-Canon Robot Masters
Sonic Man | Dyna Man | Volt Man | Bit Man | Blade Man (PC) | Oil Man (PC) | Shark Man | Torch Man | Wave Man (PC) | Dangan Man | Konro Man | Aircon Man | Komuso Man | Clock Men | Compass Man | R-Shadow | Constellation Droids
Cartoon/Comics/Anime
Dr. Wily | Proto Man | Origami Man