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These characters openly and consistently antagonize Sonic and his allies. Most of them wish to Take Over the World or destroy it.

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Dr. Ivo "Eggman" Robotnik

"I know, I say that every time, but this time, really, nothing will stop me!"

Debut: Sonic the Hedgehog

Voiced by Masaharu Sato (Segasonic the Hedgehog), Junpei Takiguchi (Japanese, OVA), Chikao Ohtsuka (Japanese, Sonic X, 1998-present), Edwin Neal (English, STH: The Movie), Deem Bristow (English, 1999-2004), Mike Pollock (English, Sonic X, 2005-present)^[when?]

Sonic's longtime nemesis and primary antagonist of the series. He boasts an IQ of 300 and is marked by his comically obese appearance.

• Acrofatic: He can keep pace with Sonic for some reason, despite his pudgy exterior.
• Adult Child
• Aesop Amnesia: From Sonic Adventure through Sonic Unleashed, he never seemed to learn that Evil Is Not a Toy. He seems to have recently learned in Sonic Colors.
  • In Sonic Generations he finally manages to harness the power of a Cosmic Horror without losing control of it at any point
• Affably Evil: Despite really wanting to Take Over the World (and occasionally going to some extreme lengths to achieve this goal), Eggman's a fairly pleasant fellow who treats his enemies with respect. Well, most of the time.
  • In the Heroes manual, he's described as a romantic and a feminist, as well as being a self-professed gentleman.
    • Said manual then points out that it's a tad hard to see such qualities behind the maniacal laughter often accompanying his announcements of Global Domination.
  • In Colors he takes Sonic's advice regarding threatening him directly rather than going through a bunch of terrible amusement-park-related puns on the way--for which Sonic then thanks him.
• American Kirby Is Hardcore: In Japan, he was always the Affably Evil Egg-themed Eggman with silly animations and a happy disposition, but for most of his American history (not counting AoStH) he was sinister and considered a huge threat. Nowadays he seems to be a strange mix of the two personas.
• Anti-Villain: In Sonic X at least. Arguably more an Affably Evil villain early on, but by the third season, his role as true villain is all but gone.
  • Was arguably in this trope in Sonic Heroes, as it is heavily implied that he regretted the outcome of Metal Sonic revolting against him.
• Appropriated Appellation: "Eggman" was introduced stateside as a mocking nickname, but he seems to have embraced it.
• Arch Enemy: To Sonic, and seemingly small animals everywhere.
• Arson, Murder, and Jaywalking: An early Archie Comics description of him described him as Supreme Dictator, Industrial Polluter, Meglomaniac, Corrupt Politician, Underhanded Reprobate, Rainforest Ravager, Puppy Kicker, Oil Spill Coordinator, Holiday Hater, and an Insurance Salesman.
• Awesome McCoolname: Doctor Ivo Robotnik.
• Badass Mustache: He has it.
• Bad Liar/Suspiciously Specific Denial: Claiming that his amusement park was created to make up for his past transgressions and is in no way secretly covering up an evil scheme.
• Bald of Evil: He is bald, and he is evil, so....
• Beware the Silly Ones
• Big Bad: As mentioned above, he is the central antagonist of the series. Lately, however, he has taken a more secondary role in certain titles due to more fearsome antagonists entering the scene. It doesn't help that he ends up a patsy for so many of them. Apparently, SEGA had paid attention to this, and now Dr. Eggman is the main Big Bad of the recent Sonic games, such as Sonic the Hedgehog 4 and Sonic Colors. In Sonic Generations not only he's the Big Bad but he also makes an alliance with his past self.
• Black Eyes of Crazy: In the Adventures of Sonic the Hedgehog animated series.
• Cheshire Cat Grin: Just look at that shit-eating grin...
• Deface of the Moon: Blows up half the moon in Sonic Adventure 2, though it seems to have been retconned in later games.
  • If Sonic X is any indication, he repaired it shortly after the events of the game
• The Determinator: You do have to give him the credit, for no matter the setbacks, he'll always try to defeat Sonic. Deconstructed in the Archie comics during Ian Flynn's run; there, the constant setbacks were slowly cracking his mind until issue 200, in which he finally suffers from a completely disturbing and realistic Villainous Breakdown. However, not long afterwards, he recovers from said breakdown by reasoning himself out of it.
• Ditzy Genius: He has an IQ of 300, but is simultaneously very childish.
• Dub Name Change: From "Eggman" to "Robotnik". Eventually, due to the western continuities becoming obsolete once Adventure came out, they eventually decided to name him "Ivo Robotnik" (with "Eggman" as a nickname) in all versions.
• Egopolis: Eggman wants to create Eggmanland, a city bearing his likeness. In Sonic Unleashed, he succeeds at this.
• Even Bad Men Love Their Grandpas: He has a deep respect for his grandfather, Gerald Robotnik, and it is heavily implied that he may have desired to conquer the world because he felt that his grandfather was unjustly arrested.
• Even Evil Has Standards: Typically downgraded to assisting the heroes, lest an even crazier person tries to destroy the planet. Is also genuinely horrified when he learns that Gerald Robotnik apparently sold out his home planet to Black Doom for the sake of research.
  • Also, when Chip states that Eggman might be starving Professor Pickle when he had him imprisoned, Tails remarks to Chip that Eggman's most likely going to be feeding him while imprisoned, as "even he isn't that cruel." Of course, that's not saying that the food is actually edible, but still.
• Evil Counterpart: To Tails in several ways, especially in Sonic Adventure 2.
• Evil Genius: What did you expect?
• Evil Is Hammy
• Evil Is Not a Toy: In much of the 3D games from Sonic Adventure through Sonic Unleashed, he's displaced by the evil he's unsealed as the Final Boss.
• Evilly Affable: Most of the more ruthless alternate incarnations (e.g. the SatAm and Archie comic interpretations) at least have some moderate goofy or whimsical traits.
• Evil Virtues: Hard worker and a lifelong admiration of his grandfather, Professor Gerald Robotnik. Word of God also states Eggman as a wannabe feminist with a hidden romantic side, though we never see it in action. On that note, judging by two Freeze-Frame Bonus moments in Sonic Unleashed, Eggman is also a fan of the SegaDreamcast, carrying it with him all the way to Sonic's battle with Dark Gaia.
• Fat Bastard
• Fat Idiot: Inverted: Eggman, though bumbling and slightly unstable, is a technological genius.
• For the Evulz: Some alternate interpretations, particularly the StC and SatAM versions, revolve many of their plans or past-times on the suffering of innocents. The games and Sonic X versions are more toned down, though they do retain Card-Carrying Villain traits on occasion.'
• Four Eyes, Zero Soul
• Game Over Man: While not explicitly appearing on the Game Over screen, the Megadrive game endings depict Eggman taunting you if you missed some Chaos Emeralds. (In Knuckles' Sonic 3 quest, this role is filled by Eggrobo/Metal Sonic.)
  • Played straight in Sega Sonic the Hedgehog and Sonic Spinball. You'll hear his digitized laugh whenever you lose a life.
• Gasshole: According to Sonic in Sonic Colors.
• Goggles Do Nothing: In his Sonic Adventure tenure.
• Gonk: Looks rather cartoonish compared to other humans in the series.
• Image Song: "E.G.G.M.A.N.". More recently, he's had a Leitmotif used in three successive games - Sonic 06, Sonic Unleashed, and Sonic Colors.
• In-Series Nickname: How the "Eggman" moniker was adapted for the English audiences, starting with Sonic Adventure. It was supposed to be in mockery but for some reason, it's all he goes by these days, even when referring to himself, almost to the point that the "Robotnik" name no longer has relevance (the only way it stays relevant is through his grandfather, Gerald Robotnik).
  • Also in: his cousin Maria Robotnik, Robotnik Corp., he even mention himself being "Robotnik" in Sonic Chronicles one time.
  • In Sonic Generations there's also a reference to "Robotnik" when Dr. Eggman reveals his alliance with his past self.
• It's All About Me: Not only does he paste his own face onto almost all of his creations, he wants the entire world to admire him and his brilliance.
• Japanese Pronouns: "Washi".
• Jerkass: In the more comedic iterations, especially his AoStH incarnation.
• Lampshade Hanging: Not by himself, but the lyrics of his boss theme in the Japanese soundtrack of Sonic CD references his Bald of Evil as well as one of his more defining traits of being an Evil Genius.
• Large Ham: He's this in general, especially in AoStH.
• Laughably Evil
• Lethal Chef: In Sonic Unleashed, Professor Pickle complained about the food he served, and neither Sonic or Chip enjoy eating anything from Eggmanland.
  • In Sonic Colors, Tails apparently paid an ill-advised visit to the Bucket O' Sushi food stall between cut-scenes. His only comment on the experience? "His cruelty knows no bounds".
• Mad Scientist: Of course.
• Malevolent Mugshot: Eggman must be proud of his work, because he stencils his cartoon mug on all of his inventions. The Death Egg even sported a giant mustache.
  • There seems to be some history behind this. The Space Colony ARK in Adventure 2 bears a similar visage when the Eclipse Cannon is revealed but there's no way Eggman contributed to that since his grandfather was the last person to set foot on the station.
• Manipulative Bastard: He has manipulated Knuckles repeatedly (though by the fourth time or so, it might be more Knuckles' fault) and even tricked Tails into revealing he had a fake Chaos Emerald. Also, he tricked Sonic into getting in the center of his ray to unseal Dark Gaia.
• Mean Character, Nice Actor: Eggman's English VA, Mike Pollock, is very friendly and likes to keep in touch with fans.
• Morally-Ambiguous Doctorate
• Nice Job Fixing It, Villain: In Sonic 2006, every time Silver attempts to kill Sonic, Eggman kidnaps her. In a way, he actually saved the world, as Sonic being killed in front of Elise would have had far worse ramifications, as the Final Story revealed.
• Noblewoman's Laugh: Particularly in the anime.
• Off-Model: In Sonic the Fighters, in the final fight against him, he is inexplicably smaller than Sonic!
• Opaque Lenses: Eggman's blue pince-nez glasses.
• Paper-Thin Disguise: Wears these in Sonic Shuffle and the Sonic X comic.
  • Sonic accuses King Sharyar of doing this in Sonic and the Secret Rings, only to find out it's not Eggman. Then again, Sonic did this to almost everyone in the Sonic Storybook Series, but start to get used to it eventually, only briefly confusing the blacksmith for Tails and then only stating that Gawain reminds him of Knuckles and not even mentioning Percival's resemblance to Blaze.
• Red Eyes, Take Warning: In most of the American/European non-game media. In the games, though, he has normal blue eyes hidden behind his glasses.
• Red Oni, Blue Oni: Is the red oni to Tails and the blue oni to Sonic
• Robot Master
• Scary Shiny Glasses: Manages this every once in a while, usually with a massive, toothy grin.
• Stout Strength: On and off, he's shown to be stronger than he appears, smacking a giant robot's hand away with his stomach, and punching a(n albeit small) defense turret off the wall with his bare hands.
  • He's also defined as a Power class in Sonic Riders, being able to punch out walls, cars, and even trains along the track.
• Surrounded by Idiots: Robotnik's AoStH robots.
• Take Over the World: What he wants to do in most installments/adaptations.
• Terrible Trio: Outside of the games, he formed one with Scratch and Grounder and Decoe and Bocoe. In the games, he forms one with Orbot and Cubot.
• Took a Level in Badass: In Sonic Adventure 2 in his plots going so far as to take hostages. Even partly lampshaded by our boy in blue.

Sonic: "You turned into a BIG TIME villain, doctor."

• • In Sonic Unleashed he captured Sonic in his super form and drained his Emerald energy to power a machine that detonates the planet!!! Meanwhile in Sonic Colors he creates a gargantuan space station that chains multiple planets together so as to capture aliens to power his machinery (with not a single treacherous Eldritch Abomination in sight).
  • He goes through another level in Sonic Generations, where he, yet again, gets a hold of an Eldritch Abomination. Only this time, he manages to keep it under control without it betraying him!
    • Another way of putting it is that Eggman, despite becoming a more comical villain, had become capable of a Class X Apocalypse How in Sonic Unleashed, then a Class X-2 in Sonic Colors and finally a Class Z in Sonic Generations.
• To the Bat Noun: His weapons, vehicles, and a good amount of his Mecha-Mooks inevitably have "Egg" in their name.
• Trademark Favorite Food: Eggs in Adventures of Sonic the Hedgehog.
  • He also apparently likes sub sandwiches, as he eats a whole one in just a few seconds in Sonic Unleashed.
• Vague Age: Unlike most of the heroes, Eggman's age has never been stated.
  • He's supposedly in his fifties though. He'd have to be to remember his grandfather.
• Victory Is Boring: In Sonic X, he starts crying out for Sonic's attention when he doesn't return to their home world for several months.
• Villain Decay: Come the 3D-era, Eggman began acting more silly and comedic, though continued to try and make his plans be taken seriously. It didn't help he was constantly overthrown by a bigger bad at the end of every game up until Sonic Generations.
  • He's not that serious in the 2D-era anyway, much of his animations (like running, when hit, having his feet burned in one boss of Sonic CD, etc...) are just silly, of course the American Kirby Is Hardcore marketing used early didn't help.
• Well-Intentioned Extremist: The little known details about his planned Eggman Empire apparently involve scientists as the high class citizens, indicating that it is essentially the scientist version of Outer Heaven. If it is true that his world domination plans stemmed from the perceived injustice of Gerald Robotnik's arrest, that might give him an understandable reason for desiring this.
• You Meddling Kids: "I hate that hedgehog!", his Catch Phrase from his Adventures of Sonic the Hedgehog portrayal, which gets the occasional Mythology Gag in other continuities.

Metal Sonic

"Sonic, I was created for the sole purpose of destroying you, but I could never seem to defeat you. That's why I transformed my own body with my own hands!"

Debut: Sonic CD

Robotic replica of Sonic. Has disobeyed his creator Dr. Robotnik in the past.

Voiced by Masami Kikuchi (Japanese, OVA), Junichi Kanemaru (Japanese, games), Gary Dehan (English, STH: The Movie), Ryan Drummond (English, 2004)

• A.I. Is a Crapshoot: It's generally assumed that Robotnik made an upgrade to Metal that made him go mad with power and ego in Heroes. To elaborate, Metal deluded himself into believing he was the real Sonic, and that Sonic was his "loathsome copy"!
  • In the Movie/OVA, his programming is based on Sonic's mind. After a while, this eventually becomes a crapshoot in the other direction, and he does things the real Sonic would do.
• Art Evolution: The original design is more simplistic and puppet-like, while his post Sonic Adventure 2 design gave him a little more detail and played with his proportions a little.
• Ax Crazy: Depending on the game.
• Badass Automaton
• Big Bad: In Sonic Heroes.
• Bishonen Line: His "Neo" form in Heroes is distinctly more humanoid than his CD look.
• Chewing the Scenery: Almost every one of his lines in Heroes, including the portions where he was disguised as Eggman. "All living things, KNEEL BEFORE YOUR MASTER!"
• Costume Copycat: Disguised himself as Eggman for the majority of Sonic Heroes. The real Eggman gave orders to Team Chaotix during that time in order to free himself.
  • Also repeated in Sonic Free Riders, where he disguised himself as a blue E-10000 in order to copy everyone's data and prove himself the best user of Extreme Gear.
• Crippling Overspecialization: He was created to exceed Sonic's speed, which he does very well due to having a jet engine sticking out of his torso. However, since this causes him to outright fly, he often has trouble stopping.
  • In addition, that kind of speed puts a huge strain on his insides--Metal Sonic is prone to overheating after traveling faster than Sonic for too long, when he has to spend time to cool down. In Sonic Generations, this is his one biggest weakness.
• The Determinator: His resolve is almost as strong as Sonic's.

"I WILL BATTLE YOU AS MANY TIMES AS IT IS NECESSARY."

• The Dragon
• Evil Knockoff: However, in Heroes, his desire to prove himself to be better than Sonic had progressed to the point that he thought he was the real deal.

Metal Overlord: "Guooooo! Why?! I had it all! I am the ultimate overlord, Metal Sonic. I am the real Sonic!"

• Evil Sounds Deep: In his Sonic Heroes appearance. Surprisingly, its just Ryan Drummond's Sonic voice given a robotic makeover.
• Evil Twin
• A God Am I: In Heroes.

Metal Overlord: "See me as I am, no longer afraid of anything! I shall become the ultimate overlord, ruling as the world's most supreme being!"

• Heroic Sacrifice: In the Archie Comics, Metal sacrificed himself to save Sonic and Tails by stopping a lava flow, and was eventually engulfed by it.
  • Likewise, this happens in the Movie/OVA. See "Redemption Equals Death" below.
  • Also happens in Sonic Rivals 2. He rips out his own power source to allow Shadow to use it to transport them both out of the Ifrit's dimension.
• I Have Many Names: Metal Sonic, Mecha Sonic, Metallix...
  • Though Mecha Sonic (at least in the games) is a separate character.
  • In the Movie, he was called Hyper Metal Sonic.
• Image Song: Metal Sonic has many themes, which fit him extremely well:
  • From the Genesis era, there's "Metal Sonic" from the Sega Virtual Tunes, about his purpose and personality.
  • "What I'm Made Of" from Sonic Heroes depicts his motives in the game.
  • "Never Let It Go", his theme from Sonic the Fighters.
  • "Look A-Like", shared with Sonic from the movie.
• Japanese Pronouns: "Ore".
• One-Winged Angel: Metal Overlord from Sonic Heroes, and even earlier he did this to become Mega Metal Sonic from Knuckles Chaotix.
• The Only One Allowed to Defeat You
• Person of Mass Destruction: He's this in the movie, and in his Neo Metal Sonic and Metal Overlord forms.
• Ramming Always Works His V. Max Overdrive attack, where he overclocks his systems to make himself hazardous to touch and zoom across the stage.
• Redemption Equals Death: In the Movie, Metal Sonic saves the President and Old Man Owl from an exploding hovercraft, only to be smashed into a lava pool he had opened up a few minutes ago.
• Red Eyes, Take Warning
• Robot Me
• Second Law, My Ass: Pulled this one out in Sonic Heroes; Fed up with Dr. Eggman's failures, he threw the doctor into a room and took over the Eggman Empire himself to go about his own plans.
• Shape Shifter: He gained this ability circa Sonic Heroes, at least the ability to superficially imitate them in appearance. He gets the ability to outright morph, T-1000 style by copying Chocola Chao and Froggy's data (who had the DNA of Chaos in them), and Sonic Free Riders shows that he can still pull this off to some degree.
• Some Kind of Force Field: Besides the Black Shield ability from Sonic Adventure 2 Battle, he also projects one in Sonic the Hedgehog The Movie whenever he's flying around, especially when he piledrives into Planet Freedom from space.
• The Starscream: In Sonic Heroes, although by his defeat, Eggman reprogrammed him to ensure this would never happen again--although that may not have been foolproof, since Sonic Free Riders shows he still has hints of free will, going behind Eggman's back to copy the racers data, and promptly challenge Sonic to a new race.
• There Can Only Be One: There is only one Sonic.
• The Voiceless: In all appearances barring Heroes (where he's Suddenly Voiced after receiving an upgrade) and The Movie (where he's The Quiet One).
• With Great Power Comes Great Insanity: Read the above.

Mecha Sonic / Silver Sonic

Debut: Sonic the Hedgehog 2

The other robotic replica of Sonic. Sometimes known as "Silver Sonic" and often confused with Metal Sonic, the two are actually completely different robots. He has made five appearances: First in Sonic 2 (both the genesis and game gear versions), returned in Sonic 3 & Knuckles, returned in Sonic Pocket Adventure, and made a cameo in Sonic Adventure. He also popped up at least three times in the Archie universe, the third time being as recent as issue #225!

• Art Evolution: The original design (pictured left) was a bulky, silver design that arguably resembled Sonic more than even Metal Sonic did. Sonic 3 & Knuckles did away with this, giving like a dark purple, sleeker design. While Sonic Pocket Adventure reused his Sonic 2 look, his Sonic Adventure cameo gave him yet another redesign.
• Big Bad: Of Knuckles' story in Sonic & Knuckles. Robotnik is presumably elsewhere during that time, or Mecha is serving as his Dragon.
• Big Bad Duumvirate: In Sonic & Knuckles, he enlists the aid of an Eggrobo as his ally to trying to defeat Knuckles in his story. By the time Knuckles reaches Sky Sanctuary, Mecha accidentally kills the Eggrobo by air-dashing right into his eggpod, thinking he would hit the trapped Knuckles.
• The Cameo: Gets a cameo in Sonic Adventure, which has been the only place he's been seen in years.
• Canon Name: For years, the distinction between him and Metal Sonic was in dispute, with the name "Mecha Sonic" being bandied about for both of them. Eventually, the name "Mecha Sonic" stuck for this one, and he's widely recognized as a separate entity from Metal.
  • The Archie comics are more confusing about this, however. Though they originally called Metal Sonic "Mecha Sonic", they settled on referring to him by his proper name... while using "Mecha Sonic" for Sonic's roboticized form. Whenever robots based on this robot pop up, he's referred to as Silver Sonic, and the comics are the only medium where this title isn't of dubious canonicity.
• Chuck Cunningham Syndrome: Before the 3D era, he appeared in more main series games than Metal Sonic did. Since Sonic Adventure, he hasn't been seen at all--until Archie Sonic issue #225, bigger and stronger than ever!
• Curb Stomp Battle: In his first Sonic comic appearance, he is a hulking machine, completely invincible to Sonic's attacks and almost knocked Sonic unconscious with a single punch! Fortunately for true blue, it knocked open some of the Death Egg's internal wiring, which he quickly used to short-circuit the robot.
• The Dragon: For Robotnik.
• Evil Knockoff: Arguably more so than Metal Sonic, due to him having a variation of Sonic' spin attack and spindash move, though Metal Sonic himself got these added to his own skill set eventually.
• Heel Face Turn: While Eggman built a second Mecha Sonic in the Archie continuity a year after the original was lost, Sonic managed to reprogram it to defend station square--until it was destroyed by Shadow.
• Hidden Weapons: In his Sonic 2 (GG) encounter, he has an extendable grappling arm built into his body.
• Humongous Mecha: In his first Archie comics appearance, Mecha Sonic is at least 10 times Sonic's size. If you look close enough, you can see Sonic's hand in contrast to Mecha Sonic's size.
• Megaton Punch: As mentioned in Curb Stomp Battle, he almost knocked out Sonic with one punch!
• Nigh Invulnerability: In his first comic appearance, he is completely unhindered by Sonic's efforts to fight it, and is only defeated when Sonic electrocutes it with the Death Egg's internal wiring.
• Nostalgia Boss: In Sonic 3 & Knuckles, during the Sky Sanctuary Zone, he provides this for the first two bosses from the first two games, and then finally for his own previous incarnation at the end.
• One-Winged Angel: His Super Mode form in the end of Sonic & Knuckles, where he absorbs the power of the master emerald, granting him even faster speed, as well as a energy blast attack and the ability to launch dummy rings.
  • Clipped-Wing Angel: However, using the energy blast will eventually drain his power, leaving him vulnerable while he goes to the Master Emerald to recharge.
  • The last phase of his fight provides a straighter example of this. After taking enough damage, Mecha Sonic returns to the Master Emerald one last time, but instead of continuing his assault as he's done previously, he simply floats around above you, periodically attacking with Dummy Rings. While he's able to continue on without stopping to recharge now, he experiences frequent power failures where he reverts to his normal form and drops out the sky for a brief moment.
• Powered Armor: In the Archie comics, after defeating him, Sonic crawls inside him to control him as armor while fighting Robotnik, and uses him to escape the Death Egg.
• Power Floats: Gains this in his Super mode.
• Robot Me: Shares this trait with Metal Sonic.
• Rocket Boots: Briefly uses them in Sonic 2, but only when he makes his entrance. He uses them much more often in his Sonic 2 (GG) encounter.
• Rollerblade Good: He achieves his super speed by the wheels in his heels.
• Super Mode: At the end of Sonic 3 & Knuckles, he gains one by absorbing the power of the Master Emerald.
• Super Speed: While his Sonic 2 (Genesis) encounter is sluggish, he is surprisingly fast in Sonic 2 (GG) and ups the ante in his Sonic 3 & Knuckles encounters.
• Suspiciously Similar Substitute: To Metal Sonic, though Sonic 2 and Sonic CD had overlapping development periods.
• Took a Level in Badass: Considerably in Sonic 3. In Sonic 2, he was a clunky, sluggish drone that could be taken down in less than 10 seconds. In Sonic 3, he received a considerable upgrade, getting a sleeker design, as well as super speed both on the ground and in-flight, a devastating air-dash move, the ability to slide backwards, and is much more durable, managing to survive his encounter with Sonic during the game, and later taking on Knuckles.
• The Voiceless: He has absolutely no vocal dialogue with other characters in the games. In fact, the most the audience ever gets out of him is his seemingly stunted thought processes in Rivals 2.

Orbot and Cubot

Orbot on the right, Cubot on the left

Orbot's Debut: Sonic Unleashed Cubot's Debut: Sonic Colors

Orbot: Voiced by Mitsuo Iwata (Japanese), Chris Collet (English, 2008) Kirk Thornton (English, 2010-present)
Cubot: Voiced by Wataru Takagi (Japanese), Wally Wingert (English)

Dr. Eggman's robotic assistants.

• Art Evolution: In Sonic Unleashed, Orbot had a white casing. Sonic Colors onwards, his casing was red to better contrast the yellow Cubot.
• Canon Immigrant: The concept of robot buddies to work off a somewhat comically inept Eggman likely comes from at least two adaptations.
• Characterization Marches On: Orbot was very disrespectful to his master in Sonic Unleashed, snarking on his inability to do things right, even having a different color. In Sonic Colors, he's much more like a butler with much more subtle sarcasm, some guess that it may be due to having a new voice chip, or being a new Orbot altogether.
• Cloudcuckoolander: Cubot. Though his faulty voice chip doesn't help.
• Deadpan Snarker: Orbot.
• The Ditz: Cubot.
• Harmless Villains
• Mecha-Mooks
• Motor Mouth: Cubot, especially when he gets his old voice back.
• Plucky Comic Relief
• Portmanteau: "Orbot" is one of "orb" and "robot", while "Cubot" is "cube" and "robot".
• Remember The New Guys: Both of the robots started appearing without any fanfare, as if they've been around to witness Dr. Eggman's failures for a while.
• Sarcastic Devotee: Orbot.
• Servile Snarker: Orbot in spades.
• Sleep Mode Size: When not in use, they compress themselves into a sphere and a cube, respectively.
• Snarky Non-Human Sidekick: Orbot.
• Terrible Trio: Forms one with Eggman.
• Those Two Bad Guys
• Yes-Man: Despite Orbot's snarky attitude, he's always willing to follow Eggman's orders.

Eggman Nega

"Now, the world shall be my plaything! I shall bring about an age of fear and chaos! And it shall be glorious!"

Debut: Sonic Rush

Voiced by Chikao Ohtsuka (Japanese), Mike Pollock (English)

Robotnik's counterpart from the dimension Blaze is from.

• Badass Moustache: Like Eggman, he has this.
• Bald of Evil
• Calling Your Ancestor Out: Eggman Nega's primary motivation in Sonic Rivals is revenge against Dr. Eggman (who is his ancestor) because Eggman's various failures made him be looked down upon despite having high potential in terms of intellect.
• Cool Shades: Even cooler than Eggman's pince-nez, Eggman Nega sports a Kamina-esque visor.
• Evil Old Folks: Probably. He has a gray mustache.
• Evil Twin: Of Eggman, though he may also be his descendant.
• Faux Affably Evil: A reverse on the Affably Evil Eggman, Eggman Nega appears to be pleasant and well-mannered, but is a raving psychopath under the veneer of sophistication and class.
• Four Eyes, Zero Soul
• Hoist by His Own Petard: In Sonic Rivals 2, he unleashed the Ifrit and, following its defeat, was sealed in the Ifrit's dimension.
• Identical Grandson: Eggman
• Japanese Pronouns: "Watashi".
• Multiple Choice Past: In some games, he is from another dimension, in others he is from the future. The different writers work around each other by making sure that no one heroic character hears both stories.
• Omnicidal Maniac
• Psychopathic Manchild
• Sarcastic Clapping
• The Sociopath

Prof. Gerald Robotnik

"All of you ungrateful humans, who took everything away from me, will feel my loss, and despair!"

Debut: Sonic Adventure 2

• Bigger Bad: In Sonic Adventure 2.
• Broken Pedestal: Dr. Ivo Robotnik idolized Gerald...after the events of Sonic Adventure 2...not so much.
• Colony Drop:This is his way to gain revenge on humanity, by destroying the Earth with the ARK.
• Despair Event Horizon: Once Gerald was a highly respected scientist who wanted to help people through science. After his granddaughter Maria's death at GUN's hands, he quickly started becoming evil and ended up a wannabe Omnicidal Maniac as his Final Speech shows.
• Final Speech: Gerald's speech to the firing squad set to execute him is basically a "You've Been Warned" speech to all humanity.
• Mad Scientist: Gerald, unlike his grandson, Dr. Ivo Robotnik, was not this and used his inventions to help humanity. Even the Eclipse Cannon was to be used to stop Black Doom as revealed in Shadow the Hedgehog. Then Maria died and then he definitely became a Mad Scientist.
  • His experiments and deal with Black Doom, allowed him to create both Shadow the Hedgehog and his prototype, the Biolizard.
• Misplaced Retribution: Wanting to destroy all humanity when only GUN was responsible for his granddaughter's death.
• Omnicidal Maniac: But only after Maria's death and the related plan happens far after his death.
• Posthumous Character: However, his plan to destroy the Earth by crashing the ARK into it keeps going on even fifty years after his death.
• Supervillain Lair: Used the ARK, a giant space station he created, for making experiments to destroy the world after becoming evil.

Biolizard

The prototype of the Ultimate Lifeform, AKA Shadow the Hedgehog. Also part of Gerald Robotnik's plan to destroy the Earth. Only appears in Sonic Adventure 2 and the 3DS version of Sonic Generations.

• Colony Drop: Tries this by fusing with the ARK in the final phase of its boss fight, so it can fulfill Gerald's plan.
• Dragon-in-Chief: Keeps Gerald Robotnik's plan going, even after Gerald is dead and Shadow has made a Heel Face Turn.
• Final Boss: Of Sonic Adventure 2, first fought with Shadow and then Super Sonic and Hyper Shadow.
• Psycho Prototype: To Shadow, the Ultimate Lifeform.
• The Voiceless: It does roar though.

Black Doom and Doom's Eye

"I gave you life, and this is how you repay me? The irony of it is, I gave you life. And now, I'll take it back."

Debut: Shadow the Hedgehog

Voiced by Ryuzaburo Ohtomo (Japanese), Sean Schemmel (English)

An alien being from the Black Comet who helped create Shadow and tries to enlist his help in conquering the Earth.

• Aliens Are Bastards: Well, yeah, pretty much.
• Big Bad: Of Shadow the Hedgehog.
• Eldritch Abomination: Look at him!
• Even Evil Has Loved Ones: He does seem to care for the Black Arms Soldiers, if even only a tiny, tiny bit. Plus, he would much rather have Shadow be his loyal second in command, rather than have to kill him.
• Evil Sounds Deep
• Hoist by His Own Petard: Although Shadow's immunity to Black Doom's use of We Can Rule Together's derivations are unknown, its heavily implied that the reason why Shadow was immune to Black Doom's gas is because he has Black Arms blood in him, more specifically the blood Black Doom gave to give birth to Shadow the Hedgehog.
• I'm a Humanitarian: Oh dear God, yes. Though it's not Black Doom so much as the entire Black Arms race. And they don't seem to be content with just feasting on humans...
• Japanese Pronouns: "Ware".
• Killed Off for Real
• Luke, I Am Your Father: Kind of. His blood was used to create Shadow.
• Monster of the Week
• One-Winged Angel: His "Devil Doom" form. Looks something like this.
• Sorcerous Overlord
• To Serve The Entire Planet: Black Doom's ultimate goal. And he would have pulled it off if Shadow didn't turn out to be immune to his nerve gas and We Can Rule Together antics.
• We Can Rule Together: He pulls this a couple of times, though he's (arguably) really bad at it, and seems to honestly be surprised when Shadow says no.

Nack the Weasel / Fang the Sniper

Debut: Sonic Triple Trouble

Known as "Fang the Sniper" in Japan and "Nack the Weasel" in America. However, he was known as "Fang the Sniper" in the American release of "Sonic the Fighters". He's a treasure hunter out for cash. His only main appearance was in Sonic Triple Trouble, and he had a few more in spinoffs, but that's it.

• Bounty Hunter
• Chuck Cunningham Syndrome
• Cool Bike: His airbike, the Marvelous Queen.
• Fangs Are Evil: Why else do you think his (Japanese) name is Fang?
• The Gunslinger
• Mix and Match Critter: According to his Japanese backstory, Fang is half-wolf, and half-weasel, which is probably why he was called a "Sniper." "Nack the Wolf-Weasel" doesn't sound right, however.
• Nice Hat
• Revolvers Are Just Better: In "Sonic the Fighters," Fang has two revolvers that shoots corks.
  • Family-Friendly Firearms: The aforementioned revolvers were originally going to be Magnums with bullets.

Mephiles the Dark

"Why fight at all? Why risk your life for those who will persecute you later?"

Debut: |Sonic the Hedgehog 2006

Voiced by Takayuki Sakazume (Japanese), Dan Green (English)

The true villain of |Sonic the Hedgehog 2006, and half of the god of light, Solaris.

• Ax Crazy: Let's see, his plans essentially amount to the destruction of existence in itself, his hatred of Shadow is almost to the point of psychosis, and he also laughs exhileratedly at Sonic's death? Seems to fit that to a T.
• Big Bad: In Sonic 2006
• Color-Coded for Your Convenience: The main difference between him and Shadow; initially, Mephiles's stripes are a gray-blue instead of Shadow's red.
• Complexity Addiction: His plans could be... a bit simpler.
• Dark Is Evil: Just look at his name; Mephiles the Dark.
  • Given he's the mind of Solaris, it's more spiritual darkness.
• Dirty Coward: He fights usually when the opponent isn't looking, he even murdered Sonic while his back was turned.
  • A dose of Fridge Brilliance, considering he was the mind and will of Solaris while Iblis, his counter-part, was the raw power. It'd stand to reason he's not powerful enough to take anyone on in a head-on fight without some additional support. In other words, he knows his limitations.
• Evil Laugh:
• Evil Twin: To Shadow
• Expy: Of Agent Smith.
• For the Evulz: The only suggestible reason that he wants to completely destroy space and time. Beyond being pissed at some scientists experimenting at you.
• Fragile Speedster: Played with: He's very intelligent, capable of teleportation, time travel, and energy manipulation. However, he has noticeable trouble taking physical punishment while fighting Shadow, although he was shown taking on and withstanding several shotgun/minigun blows from Omega when confronting him in a cutscene.
• God of Evil: Solaris.
  • Mad God: Again, Solaris, although it's "mad" as in "rage" and not "mad" as in "insanity."
• Hellish Pupils
• Hero-Killer: Currently the only villain in the series to successfully kill Sonic (although he does get revived in the end).
• Killed Off for Real: Heavily implied by the ending of the game (via Grandfather Paradox).
• Knight of Cerebus: Prior villains were either somewhat comical, or had some justifications behind their motives. Mephiles possessed none of these, and clearly enjoys causing destruction simply because he could, and was also the first major villain to canonically kill a major character (and in fact also killed Sonic), as well as succeeding in destroying the world as well as the fabric of existence, with the final act being to stop Mephiles' Fusion Dance god form and restore the timeline.
• Know When to Fold'Em: The implied reason why he often pulls dirty tactics on his opponents.
• Lack of Empathy: He taunts Omega about his part in sealing away Shadow in the future, and he laughs after murdering Sonic, and especially at Elise's sorrow and mental anguish at his death.
• Large Ham: Probably the other reason a lot of people like him, what with being voiced by Dan Green and all...
• Laughing Mad: He laughs quite exhileratedly when murdering Sonic
• Light Is Not Good: Solaris again.
• Literal Split Personality: Both Mephiles and Iblis. Mephiles being the conscious mind, and Iblis being the raw power.
• Living Shadow: Not only is he the Shadow Archetype to Shadow, but he's also born (well, reborn is more accurate) from Shadow's shadow. That's right, Shadow's shadow became a Shadow.
• Manipulative Bastard: This along with The Chessmaster. He manipulated seemingly everyone in the story over 210 years just so he could force Elise to develop feelings towards Sonic, only to kill Sonic, thus freeing Iblis from inside Elise, allowing himself to merge with Iblis to become Solaris.
• Names to Run Away From Really Fast: Overlaps with Meaningful Name. Mephiles = Mephistopheles, the demon from Faust, sometimes associated with Satan. Likewise, Iblis is the Islamic word for devil.
• Nietzsche Wannabe: He asks Shadow why he continues to fight and attempt to protect humanity when they'll only persecute him later on.
• No Mouth: His muzzle kind of inflates and deflates when he talks, though.
• Obviously Evil: And yet, the plot hands out a 10-ton Idiot Ball to Silver and Blaze, as they believe him.
  • They live in a post-apocalyptic world, and are one of the few people left alive. It's doubtful they're familiar to this trope.
• Omnicidal Maniac: He wants to destroy all time and every timeline. Why? Never explained.
  • It's heavily implied that his reason is because he loves destruction. Craves it, in fact.
  • Plus you'd be pretty pissed too if some scientists decide to drag you out of your reality and experiment on you.
• Our Demons Are Different
• Physical God: If it wasn't obvious.
• Red Eyes, Take Warning: An inversion. His irises are normally green, while in his One-Winged Angel form, the sclera (the white part of the eye) turns completely red.
• Satan: He's practically the Sonic universe's equivalent of this. See above.
• Sealed Evil in a Can: Shadow sealed him in the Scepter of Darkness.
• Smug Snake: He's both manipulative and a big planner, but his lack of common sense makes him this.
• Time Travel: Seems to be one of his main abilities.
• World's Strongest Man: As Solaris, he thus far the most powerful being in the series, capable of destroying reality and time itself as well as needing the combined efforts of three Super Hedgehogs to beat him. Even then, they only managed to beat him by attacking his core repeatedly, thus ending his consciousness.

Dark Gaia

• Big Bad Ensemble: With Dr. Eggman in Sonic Unleashed.
• Complete Immortality: Has this along with Light Gaia, but it can still be put through a lot of pain by Sonic.
• Eldritch Abomination: Lives within the Earth and tries to bring its destruction, was born at the beginning of time and is the representation of night, darkness and destruction.
• Evil Counterpart: Of Light Gaia, AKA Chip.
• Final Boss: Of Sonic Unleashed.
• Lovecraft Lite: Is a Lovecraftian Eldritch Abomination out to end the world, but Sonic can still kick its ass with assistance from Chip AKA Light Gaia, Dark Gaia's Good Counterpart.
• One-Winged Angel: Perfect Dark Gaia.
• Press X to Not Die: Makes the player do this 60 times in its Perfect Dark Gaia form in the Play Station 3/360 versions of Sonic Unleashed.

Captain Whisker

Debut: Sonic Rush Series Adventure

A robot pirate from another dimension.

• Dual Boss: With Johnny.
• Hijacked By Eggman and Eggman Nega
• Killed Off for Real: Heavily, heavily implied.
• A Pirate 400 Years Too Late: or possibly more
• Pirate Parrot: Mimi and Mum.

Erazor Djinn

Voiced by Masashi Ebara (Japanese), Peter Cormican (English)

The evil genie of the lamp who wants to erase the Arabian Nights.

• Abusive Parents: Implied to be this or a Domestic Abuser to Shahra.
• And I Must Scream: before his death in the lava
• Big Bad: Of Sonic and The Secret Rings
• Clipped-Wing Angel: His transformation is actually incomplete. Because he got the wrong sacrifice, he wasn't able to absorb all seven World Rings.
• Cool Sword
• Domestic Abuser: Implied to be this or an Abusive Dad to Shahra.
• Family-Unfriendly Death: Baked in lava
• A God Am I: In his One-Winged Angel mode.
• Go for the Eye: As Alf-Layla-wa-Layla.
• Killed Off for Real
• Manipulative Bastard
• Meaningful Name: Both. Erazor Djinn is a mix of 'Eraser' and 'Razor', as to how he's tearing apart the Arabian Nights. And again as Alf-Layla-wa-Layla, which translates as 'A thousand nights and one night'. He's calling himself The Arabian Nights.
• One-Winged Angel: Alf-Layla-wa-Layla
• Playing with Fire: Ironic, considering his death
• Walking Shirtless Scene

Merlina

"You could never understand my sorrow at seeing the ruinous future of this kingdom."

• Anti-Villain: Merlina wants to make her world never end, by making it never change, so it won't end in warfare.
• Big Bad: Of Sonic and the Black Knight.
• Big Bad Friend: Merlina seems to be Sonic's ally early on but is using him for her own means.
• Dark Action Girl:Played with, she's an antagonist and the Final Boss but is an Anti-Villain.
• Females Are More Innocent: The only female villain in a Sonic game that is the Big Bad of her game, and is an Anti-Villain Well-Intentioned Extremist. Compare her to the other villains on this page.
• Final Boss
• Well-Intentioned Extremist: Merlina wants to save her world...by stopping it from ever changing.

E-101 Beta

A robot in the E-Series made by Dr. Eggman. The final boss for Gamma.

• Breakable Weapons: You can destroy Beta's fireballs with Gamma's cannon.
• Climax Boss
• Cyber Cyclops
• Kill Sat: One of his attacks. He is invincible during said attack.
• Painful Transformation: While it's never specifically shown whether or not Beta could feel pain, Gamma's reaction to seeing his brother's in-progress transformation would imply this is the case.
• Psycho Prototype: To Gamma
• Tactical Suicide Boss
• Unwilling Roboticization: He's powered by a Flicky.
• We Can Rebuild Him: Was rebuilt as, E-101 Beta MKII, after being defeated by Gamma the first time around.
• Wolverine Claws: Mostly just for show, but there is one attack where he uses them. That attack is when he's vulnerable.

Imperator Ix

The final boss of Sonic Chronicles.

• Evil Overlord
• Final Exam Boss
• Fully-Dressed Cartoon Animal: He even wears a big hat.
• Glowing Eyes of Doom
• Power Floats
• Super Mode
• Token Wholesome: In contrast to the other males

Tails Doll

Fan-favorite floating doll from Sonic R. Well known for the curse.

• Creepy Doll
• Evil Knockoff
• No Mouth
• Power Floats
• The Psycho Rangers

ZERO

The robot who kidnaps Amy in Sonic Adventure

• Climax Boss
• Killer Robot
• Psycho Prototype: Said to be one to Gamma
• Puzzle Boss: Knock him into the electrified fence to attack him
• Ring Out Boss
• Super-Persistent Predator: Amy must avoid him in every level
• Unwilling Roboticization: Averted. He is run on batteries, not an animal

Time Eater

An Eldritch Abomination capable of destroying time and space, as well as alter time and space in various ways. Time Eater starts destroying history and petrifies Sonic's friends during Sonic's birthday, making Sonic team up with his past self to stop the Time Eater in Sonic Generations.

Time Eater is technically an Eldritch Abomination, but also a Humongous Mecha, transformed into such by the Villain Team-Up of Doctor Robotnik and his past self. Both Robotniks control the Time Eater to erase their previous defeats at Sonic's hands.

• And I Must Scream: Does this to Sonic's friends, as they are Taken for Granite due to it, but implied to still be aware.
• Big Bad: Of Sonic Generations until it is revealed that Dr. Robotnik and his past self are controlling it.
• Eldritch Abomination: It eats time and space. Nuff said.
• Expy: Of Solaris. It's a giant purple abomination which can tear through time and space and just like Solaris is also able to eat them. Also, like Solaris it doesn't speak.
• Final Boss, New Dimension: Sonic and his past self fight the Time Eater and both Robotniks in the Center of Time, where pieces of various stages featured throughout Sonic Generations float around.
• Humongous Mecha:Turned into this so Dr. Robotnik and his past self can control it to erase their past defeats at Sonic's hands.
• Reality Warper: Done through destroying time and space.
• Super Strength: Able to easily knock out Sonic and his past self and nearly crush them, while holding back, with one arm. Fortunately, Sonic's friends cheering on both of them allows them to get up and defeat the Time Eater.
• Taken for Granite: All of Sonic's friends who came to his birthday party have this happen to them, due to the Time Eater.
• Unwilling Roboticization:Done by Robotnik and his past self.
• The Voiceless: It does grunt and growl sometimes even though both Robotniks are controlling it. They also talk while piloting it before the final boss fight.