Robotnik

**Doctor Ivo Robotnik** (ロボトニック *Robotonikku***?**, lit. "Robotnik"), better known by the alias **Doctor Eggman** (ドクター・エッグマン *Dokutā Egguman***?**), is the main antagonist of the *Sonic the Hedgehog* series. He is an evil human scientist and the arch-nemesis of Sonic the Hedgehog. Boasting an IQ of 300, Eggman is a self-proclaimed evil scientist and a genuine genius megalomaniac who dreams of dominating the world with his Eggman Empire using his scientific expertise. For all his brilliance, however, Sonic and his friends constantly find a way to foil his plans and keep him at bay.

Never discouraged from his goals, Eggman is always able to come up with a seemingly endless supply of plots to make his world conquest dreams become a reality. His ambitions and schemes ever growing, his plans have evolved from his days of making Animals his robot slaves into incredibly dangerous global threats that have involved building war machines, using doomsday devices to threaten entire nations, and relying on ancient mythological deities or eldritch abominations bent on destruction, all in the name of achieving his goals. Eventually, Eggman has gone as far as to target the entire universe and hatched schemes to control time and space itself.

While all of these plans end in failure due to the continued efforts of Sonic and his friends, the mad doctor is somehow always able to slip away from certain death or imprisonment and escape at the last moment, making him a constant threat to the universe and a thorn in Sonic's side.

## Concept and creation

In April 1990, Sega petitioned its research and development department, AM8, to create a character who would replace Alex Kidd as the company's mascot, as well as compete against Nintendo's flagship character, Mario. Among the proposed designs was a man wearing pajamas, drawn by Naoto Ohshima. However, this character did not win the contest; instead, a hedgehog character named Sonic the Hedgehog, also created by Ohshima, prevailed.

Despite the character having been rejected, programmer Yuji Naka thought the idea was excellent for the main villain of the game. Combined with the idea of an egg-shaped character, it eventually became the basis of the visual design for Dr. Eggman. In creating the "bad guy" for the *Sonic* series, the development team wanted a character who was "the opposite of Sonic"; a character who represented "machinery" and "development" to play on the then-growing debate between developers and environmentalists. The character was also designed to be easy for children to draw.

Despite Eggman possessing a consistent look in Japanese material, early Western material would give the character different variations in appearance. The most notable change was the lack of glasses, in their place completely black eyes. Some merchandise featuring the character, most commonly in the United Kingdom, would even make use of his design from the *Adventures of Sonic the Hedgehog* television series. However, America and Europe would slowly adopt the Japanese design. With the release of *Sonic Adventure* worldwide, the designs used for Western material were scrapped.

### Naming

Though the character was always known as "**Dr. Eggman**" in Japan, Sega of America changed his name to "**Dr. Ivo Robotnik**", which was used in the American and European manual of the original *Sonic the Hedgehog*. Takashi Iizuka would later reveal in 2016 that the change was done without Sega of Japan's consent. In 1998's *Sonic Adventure*, he was referred to with both names, the doctor calling himself "Robotnik" and the rest of the characters naming him "Eggman", with all following English releases to date referring to him as the latter.

Yuji Naka has explained that "Robotnik" is the character's true last name, while "Eggman" is a "common name taken after his shape."

Despite this, "Robotnik" is still occasionally recognized in more recent titles. However, no direct mention of this name was made in Japan, typically fully avoiding the use of "Robotnik", such as Sonic Channel listing Eggman's full birth name as unknown. Nevertheless, the name itself made brief appearances on rare occasions, such as when Eggman broadcasted his announcement in *Sonic Adventure 2*, with the text "ROBOTNIK EMPIRE" making brief appearances behind him; and the company Robotnik Corp. (ロボトニック社 *Robotonikku-sha***?**) in *Sonic Riders*.

## Appearance

* Dr. Eggman before the Chaos incident, from *Sonic the Hedgehog CD*.

**1/6**

Dr. Eggman is an obese, tall human with a small, bald head with blue eyes, a pinkish nose, and a bushy, mahogany-colored mustache.

During his early years, up until before the Chaos incident, Eggman had a totally spherical torso with thin but proportionate arms and legs. He wore a red top with a short yellow cape, attached to his shoulders by a triangular collar, black pants with attached boots and a pair of large silver buttons on the front, white globes, and mirrored pince-nez glasses. His nose was also bright red and his mustache was neater, with only three tufts sticking out at each end.

Since the Chaos incident, Eggman has remained obese, but has become somewhat taller and burlier, with a torso roughly shaped like an egg, hence his nickname; long, almost disproportionately thin arms and legs; and a softer pinkish nose. His mustache retains its length, density, and mass, while also becoming much more unkempt. For attire, Eggman now wears both his tinted glasses and green-lensed goggles as headwear; and an elegant, red coat sporting two square metal buttons on both sides of the chest in gold. These buttons have white straps that run across the coat's sides to identical buttons on the back. The coat also has silver, zipper-like linings down the back, arms, and front, yellow cuffs, and two extensions on the front that have large silver buttons. In addition, Eggman wears white, cuffless gloves on his hands and a pair of black pants with matching boots seemingly attached to them bearing circular plates on the both sides of the ankles and three square ones riding up the shin.

On special occasions, Eggman has worn different outfits:

* For the purpose of camouflage, Eggman wears a military suit that consists of a black helmet that covers most of his head, a pair of large, black glasses, and a jacket that looks almost identical to his normal one except that it is black instead of red.
* For the purpose of Extreme Gear racing, Eggman wears a bright red coat with a small white cape, two zippers on the sides and one at the center, and yellow cuffs; and a white T-shirt. While still retaining his gloves, glasses and pants, he also wears a white helmet with his goggles and a gray belt with a golden buckle on it.
* During the Tokyo Olympics, Eggman has worn a pair of black shorts, a white T-shirt, and red and white sneakers with gray soles; in addition to his standard pince-nez glasses and goggles.

During the Solaris incident, Eggman had a radically different appearance. In particular, he had yellow bolt-like buttons on his red coat where the buckles originally were, as well as a slightly raised collar obscuring his chin. His mustache, while still bushy, also looked more groomed, and he also, while still overweight, looked very lean by comparison to his usual designs. His nose was also colored the same as the rest of his skin.

## Personality

Eggman is a short-tempered, raucous, pompous, and cruel evil genius who always thinks about doing bad things. Said to be the world's most evil and vindictive person, as well as its worst screw-up, his primary motivations most of the time are the ridiculous delusions of grandeur he suffers and his psychotic belief that the problems of the world will be solved if he rules the planet. He uses his scientific genius and robotic expertise to create weapons and gadgets in his bid to conquer the world and establish his Eggman Empire. While his views of the world cannot be understood by normal people, he believes that an enslaved planet filled with machines under his rule, which is embodied in the form of Eggmanland, is the ultimate utopia.

Eggman is noted for being extremely narcissistic and egotistical, having done all of his actions only for his own benefits. Most of his bases and creations have his own face and name on them, which has sometimes turned up against him; at the start of the Little Planet incident, he chained Little Planet to a mountain with his own face sculpted on it, which led to Sonic suspecting that the doctor was behind this immediately after seeing the mountain. His narcissism is such that when he first discovered the Phantom Ruby, it showed his deepest desire in the form of a complete Eggmanland with various labels of his names and statues to himself.

Possessing no empathy or care for others, Eggman puts his own well doing and necessities over anybody else's, even ignoring his allies when revealing himself and giving all the credit to himself instead. If the doctor worries about others, it will almost always be for his own benefits, usually resulting in short alliances. As such, he is willing to abandon his allies if they have served their purpose; a notable example was during the Angel Island incident, where he tricked Knuckles to cooperate with him and later stole the Master Emerald from him to power his Death Egg. It is also implied by Orbot that Eggman does not care about the wellfare of his own minions and treats them badly. This is best illustrated during the Chaos incident, where Eggman got rid of most of the E-100 Series robots when they were unable to satisfy him, referring to them as "worthless hunks of junk".

Despite his intelligence, Eggman can be very immature, which is said to be the cause of his obsession with world domination. This childish behavior makes him believe that taking over the world can be easy. He is also often prone to throw emotional and childish outbursts when Sonic manages to wreck his plans. His immaturity is usually best displayed whenever he gets insulted or when his plans begin to break apart when victory was previously assured. This, combined with his narcissism, makes Eggman tend to overestimate his abilities, overlooking crucial details in his plans and underestimating his enemies' chances of winning. Because of this, he can be very blind whenever he believes he has the upper hand, celebrating too early before he has completely overpowered his enemies, usually leading to his plans progressing much slower than planned; even then, Eggman refuses to listen to the consequences of the poor execution of his own planning and simply complains about his bad luck instead. In fact, Eggman has gained somewhat of a reputation for screwing up at his plans, even when he has all the chances of winning with him. Similarly, it was stated that, despite being convinced that he has a master plan, he is never actually sure how to pull it off.

Behind his immaturity, Eggman can be very serious and threatening. However, he shows this side very rarely, usually when extremely aggravated or during very serious situations. Under this pressure, he often attempts to intimidate his opponents by death threatening them. Notable instances of this include the Chaos incident, where he threatened Tails while barely even raising his voice after the fox cub had foiled his attempt to destroy Station Square; and the Lost Hex incident, where he, after being taunted by the Deadly Six about the impending destruction of the world, threatened them in an even-handed manner to destroy everything they desired before smashing the ice-block communication set they were using and retaining this tone when telling Orbot his hands were okay from smashing the ice blocks so long as he could strangle a Zeti with them. On a similar note, he was also shown to possess a rather bleak and cruel sense of humor, even joyfully narrating the dangers his interstellar amusement park possessed during the Wisp incident. Similarly, in his propaganda video "Come Join the Eggman Empire" during the War to Take Back the Planet, he happily said that living in an area filled with pollution is a lot better than in one with clean air, especially after a Robotomy Treatment that saps its citizens of their ability to eat, sleep, and think ever again; which he claimed to be the "good life."

Eggman stands out with his passion and love of robotics and machines in general, which he puts over anything else in life. In fact, his fondness for them reaches the point where his definition of a perfect world is a planet with nothing but machinery. He believes that machines look beautiful, and likes the fact that he is able to control them to his will. Because of this, Eggman always tries to replace all nature in the world with his machinery, even standing by his conviction that living in a heavily industrialized and polluted place is a better alternative to living in one with clean air. A notorious polluter, he does not care about the damage he does to the environment and loves in particular to overexploit the natural resources of the planet.

Eggman has never shown a willingness to do good or help others without it serving his own ends in some way. While sometimes displaying a comical disposition, he is still a cruel minded and brutal man who will use any opportunity presented to him to fuel his self-serving desires, even exploiting worldwide catastrophes to obtain power and dominance. Eggman's numerous crimes and exploits continuously transition into more destructive ramifications. Not caring about the consequences of his operations over the world's residents, Eggman is even willing to destroy entire lands if he can gain something from it; notably, during the Lost Hex incident, he was willing destroy the entirety of the Lost Hex to get rid of the Deadly Six, despite Sonic saying that doing so would cause the Animals on the continent to die, to which Eggman implied that "some sacrifices would be necessary". On a similar note, it was also implied that part of the reason he recruited Infinite and his Jackal Squad was due to him being genuinely impressed with the mercenary's innate desire to cause the world to become war-torn after seeing his vision via the Phantom Ruby. Though very rarely, Eggman is even willing to make suicide attacks as a twisted form of revenge; during the Chaos incident, he launched a missile deep into the heart of a heavily populated Station Square to utterly destroy it, even if that meant killing himself in the process, after Sonic and his friends caused his plans to use Chaos to dominate the planet failed. However, he appears to be blind about the catastrophes he causes, believing that these are actually good works of his for the well being of mankind and animals alike, and that he intends to make the world a better place.

Despite his desire for world domination, Eggman does, somehow, have a human side in his personality, as he is not necessarily "evil" and does not appreciate senseless destruction, tormenting and killing from other individuals and forces who are beyond his control. During the Black Arms incident in particular, he was shown to be disgusted and shocked at the thought that his own grandfather would sacrifice his own people for the sake of research and aid the Black Arms. His more humane side was shown in full force at the end of the Space Colony ARK incident, where he had an honest and genuine conversation with Tails about how much he adored his grandfather, questioning the actions of his fallen idol and wondering if he intended to destroy him as well.

I can't figure you out. One second you're contemplating genocide, and the next you're saving one of your worst enemies.

I'm a complicated guy.
— Sonic the Hedgehog and Dr. Eggman, *Sonic Lost World* — Sonic the Hedgehog and Dr. Eggman, *Sonic Lost World*
— Sonic the Hedgehog and Dr. Eggman, *Sonic Lost World*

That said, however, Eggman seems to have no problem in committing senseless killing and destruction as long as he is the one in control of the forces doing so. The doctor is so bent on authority, that he refuses to let others destroy his planet outside *his* direction. This was best shown when Chaos betrayed Eggman and flooded all of Station Square, an action that Eggman had planned Chaos to do from the very beginning regardless of the beast's betrayal against him, but refused to allow his rampage to continue aimlessly. Also, during the Lost Hex incident, Eggman was content with conquering what was left of the world after the Deadly Six's actions, supporting that he does not care what condition the world is in as long as he is the one ruling it. Likewise, he is also not tolerant in destruction if it is done by a third party, especially if it interferes with his own goals of building his Eggman Empire. This was especially evident during the Black Arms incident, where Eggman considered the Black Arms to be a prime threat that could interrupt his plans. Eggman's sudden changes of heart from time to time have even confused individuals like Sonic; during the Lost Hex incident, when the doctor unhesitatingly saved Tails from a Crabmeat-controlled Cubot, Sonic asked him why he would do that, to which Eggman replied that he was "a complicated guy".

One of Eggman's more admirable traits is his courage throughout life threatening situations. The doctor always shows considerable bravery and very rarely shows fear, regardless of who or what he is facing. His persistence to control other creatures bent on mass destruction and approach them to ultimately tame them, including Chaos and Dark Gaia, also illustrate his apparent lack of fear. This can be owed partially to the fact that he has previously shown a disregard for even his own life on several occasions, as long as his plans come to full fruition. However, if he is caught without any backup plan to fall on, he is not above fleeing, such as when the Deadly Six took over his army after Sonic kicked away his Cacophonic Conch. Ne also possesses a strong confidence and an absolute refusal to give up, which can be considered one of his strongest points; despite his constant defeats, he is never discouraged by them and does not let them stop him.

Ultimately, while not openly violent and ruthless, Eggman is still a highly brutal and amoral villain with an insatiable lust for power, dominance, and, since meeting Sonic, revenge. While still harboring a more humane side and displaying comical undertones, Eggman's ruthless and violent nature can still be seen throughout the series. His uncompromising persistence shared with his appetite for authority and control fuel the conflicts throughout the entire series and guarantee that Sonic will always be needed to stop him.

## Powers and abilities

Despite what his appearance might suggest, Eggman is an immense intellectual with an IQ of 300 (or even more). Possessing overwhelming scientific power, his most well-known ability is his genius-level intellect. Noted to be the world's greatest super-genius scientist and a true genius with robotics, he is truly a certifiable genius and an excellent scientist. Possessing a renowned authority and expertise on robotics, along with being a master of robotic engineering with unparalleled technological skills, he is a remarkable inventor and engineer.

As a testament to his expertise in robotics, Eggman has designed and engineered numerous weapons and devices that include the armies of foot soldiers known as Badniks. These range from basic Egg Pawns and animal-based robots to the more weaponized Egg Gunners and juggernaut-like Interceptors and Big Chasers. He has even created some of the most powerful robots the world has seen, such as Metal Sonic, who rivals Sonic the Hedgehog in speed and power; and the E-Series, the last of which having been called the world's strongest robot. Not only that, he has also created armadas of flying warships known collectively as the Eggman Fleet that boasts unmatched power throughout the universe; orbital space stations like the E.G.G. Station and the Death Egg (the latter of which is loaded with ground-breaking weaponry); weapons of mass destruction like the Final Egg Blaster which can destroy star clusters, inventions that can control peoples' minds on a global scale; and devices that let him harness the Chaos Emeralds' mystical powers to warp time and space to his will. He has even displayed skills in merging naturally existing entities with mechanical or otherwise foreign parts, suggesting some knowledge in biological and alien physiology too: he was able to successfully turn the primordial form of the Time Eater into a cyborg-like creature and merge his finalized Phantom Ruby copy with Infinite. It is also said that he is experienced at company management, having amassed huge profits through production of robot weapons and building related facilities.

Possessing keen vehicle intuition, Eggman has incredible skill in operating his various self-designed vehicles, from his own Egg Mobile to his various mechs and combat machines. Notably, during the Space Colony ARK incident, Eggman was able to power his way through hordes of GUN's combat robots with his Eggwalker during his invasions of the highly secure areas of Prison Island. Even Sonic has been known to be kept on his toes during his battles with Eggman in his mechs. As seen during Dodon Pa's Grand Prix, Eggman also has excellent skills when it comes to driving and racing in racecars like his Egg Booster. Overall, his skills as a machine pilot are rivaled only by Tails, who was able to beat him during the Space Colony ARK incident in two mech fights. He can also coordinate with his allies very well during battles, as shown during the Sol Emerald incident, where he was able to control the Egg Salamander alongside Eggman Nega; and the Time Eater incident, where he could control the Time Eater with Classic Eggman with no problem. On a similar note, even though he has not made use of them too often, Eggman has demonstrated that he is a capable Extreme Gear rider, being able to drive various types of Gear, including his own E-Rider, with great expertise.

Owing to his masterminding plots and schemes, Eggman is also shown to be a genius in strategy and tactics; during the Space Colony ARK incident, he came up with a plan that outsmarted GUN and ensured the destruction of Prison Island. During the same incident, he also deduced that Sonic and his friends were planning to trick him into taking a fake Emerald from them and use it to undo his plans. In response, he outsmarted the heroes by trapping Sonic, anticipating that he had the fake Emerald (and tricking Tails into confirming it). Also, during the War to Take Back the Planet, Eggman not only made sure to build a backup generator for the Phantom Ruby due to anticipating the possibility that the Resistance would destroy the primary one, but also left disinformation about how the Phantom Ruby was actually generating power and leaving the "generator" as a decoy.

Intellect aside, Eggman is also quite physically powerful. Classified as a Power Type, he has considerable physical strength, enough to shatter a large and thick wall of ice with his bare hands. He is also quite physically durable, being able to survive a fall down to Sonic's world from the Lost Hex and emerge from it nearly unharmed. Also, despite what his huge, lumbering frame may imply, Eggman is able to sprint at immense speeds; during various incidents, he has been able to outrun Sonic himself for a few seconds to reach his next escape vehicle or weapon. He was also able to flee from the Deadly Six around the same pace as Sonic.

### Equipment

Despite how simple they appear, Eggman's glasses are in fact highly advanced technological eyewear. With them, he could track the Chaos Emeralds' locations in the corners of the distorted world after they were flung there by Solaris. He also has a portable jetpack concealed within his jacket. With a press of the lower-right gold button on his jacket, he can extend the jetpack's wings and initiate flight.

## Weaknesses

Despite his amazing intellect, Eggman's impatience and arrogance tend to make him act hastily and overlook crucial details when he tries to concentrate on a greater goal. Such was the case during the Dark Gaia incident when he awoke Dark Gaia too early in order to harvest its power for the construction of Eggmanland without even considering the repercussions of awakening Dark Gaia before it had reached full maturity. His childish behavior can be considered a weak spot of his as well. He also tends to let his guard down too easily.

## Relationships

### Sonic the Hedgehog

You're pretty persistent for a hedgehog, aren't you? You're still alive, huh?
— Dr. Eggman, *Sonic Adventure 2*

Sonic the Hedgehog is Dr. Eggman's arch-enemy and eternal rival. Both of them have known each other well before the South Island incident, with Sonic having crushed Eggman's plans for world conquest since before that incident. Because of this, Sonic is the one thing Eggman dislikes the most, having considered the hedgehog to be his sworn enemy. He despises the mere sight of him, and if there is anything for him to be happy about, it is when he can attack him unilaterally. However, their relationship is something that is surprisingly difficult to describe properly. One thing is for sure, though: Sonic, who has crushed each and every one of Eggman's plans, is no longer the only thing the doctor has in mind for his plans of conquest. If he wants to conquer the world, he has concluded that he has to defeat Sonic first. However, while he does not want to go out of his way to find the hedgehog and duel him, Eggman seems to be somewhat enjoying himself while toying with Sonic when he shows up at a crucial moment in his plan.

Sonic seems to tease Eggman a lot, and it is thought that the former might have given the doctor the nickname "Eggman", due to his body shape being an obvious target for criticism. Conversely, it is rare that Eggman will ever taunt Sonic back, unless he holds the proverbial cards. On the other hand, Eggman and Sonic are the kind of adversaries that take each other on not only in battles, but also when it comes to verbal exchanges such as insults and witty quips; when Eggman insults Sonic, Sonic always has a witty retort ready, and the sarcastic banter between the two is always a highlight of every conflict between them.

Despite their opposing goals and rivalry, it implied that somehow, deep down, Eggman feels admiration and respect for Sonic, and may even have a certain fondness for him and his determination. This has given him a certain amount of respect for his constant adversary; during the Space Colony ARK incident, when he appeared to have killed Sonic, he referred to the latter as "[his] admirable adversary".

Eggman, ever prideful, maintains a facade that his concern is only for world domination and not Sonic's death, although there are times when he will directly challenge him. As players approach the end of the games, Eggman refers to Sonic in increasingly threatening ways and places greater priority on stopping him. Eggman has made eliminating Sonic his second goal under world domination. It is also implied that his attempts and failures to defeat Sonic may have driven him somewhat insane, as after revealing his plan to use the Time Eater to rewrite history to ensure he came out on top, he proceeded to laugh maniacally and excessively, causing his past counterpart to become disturbed that he may eventually become as crazy as his present self. However, when trapped in the void after both Super Sonics defeated them and the Time Eater, he ultimately admitted they he never was able to defeat Sonic. By the time of the War to Take Back the Planet, his hatred of Sonic grew to the extent that he created an invincible weapon of destruction to deal back all the defeats Sonic inflicted on him. Nonetheless, he did retain at least some grudging respect for his adversary, as shortly after Infinite's defeat, he admitted his surprise and impressment that Sonic was able to defeat his creation, although he nonetheless makes it very clear that he is impressed solely in the sense that it would make his defeating Sonic more satisfying.

### Classic Sonic

You've got a lot of nerve for a pint-sized Sonic from another dimension!
— Dr. Eggman, *Sonic Forces*

Dr. Eggman first fought against Classic Sonic during the Time Eater incident in an effort to erase him. He later re-encountered him during the War to Take Back the Planet. However, during that time, it was heavily implied that he considered Classic Sonic to be more of a nuisance than a true threat to him, especially compared to his Modern counterpart; when encountering him, he dismissed him as not being worth his time and tried to disengage him before ultimately fighting him, while by contrast he scolded Infinite for letting Modern Sonic live during their encounter at Mystic Jungle. He does, however, acknowledge that Classic Sonic has "a lot of nerve."

### Miles "Tails" Prower

Killing you will be my pleasure, fox boy.
— Dr. Eggman, *Sonic Adventure 2*

Miles "Tails" Prower is another one of Eggman's worst enemies. The two first met during the West Side Island incident, where Tails aided Sonic during his quest to defeat Dr. Robotnik. However, they did not interact to each other a lot since then. This changed during the Chaos incident, where Tails managed to stop Eggman from destroying all of Station Square on his own. Since then, they have had a few moments of interaction with each other.

Notably, Tails has been one of the very few that were able to match Eggman in intellect, which was the source of their rivalry. Despite this though, Eggman is willing to (reluctantly) team up with Tails and his friends should the world be at stake. Over the course of the Space Colony ARK incident, it seemed as if their rivalry had watered down, possibly because they had to work together. At the end of that incident, Eggman even shared a conversation with Tails about how much he appreciated his grandfather. During the Lost Hex incident, Eggman and Tails had to team up to stop the Deadly Six. Despite this however, they had a very hostile relationship with each other at first, with the doctor being the target of Tails' insults, though they started to cooperate together after Tails realized his mistakes. Eggman in particular appeared to show some degree of respect for the fox cub; when Tails was captured, the doctor said that they needed to make sure that "his sacrifice was not for nothing" in a low somber voice. However, they became enemies once again at the climax of that incident when Eggman betrayed Sonic and Tails.

During the War to Take Back the Planet, Eggman also engaged in a rivalry with Tails regarding their fields in a similar manner to the Space Colony ARK incident, which was best demonstrated during Eggman's boss fight, where Tails, in response to the doctor gloating about the power he had acquired surpassed even his expectations and that his own genius scared even him at times, cited that counted as a failure due to Eggman miscalculating, before the latter pointed out that the ultimate of genius required surpassing expectations before stating Tails would not understand. Another example of this was when Eggman's artificial sun plan failed: when Eggman expressed shock and anger at the presence of another Phantom Ruby prototype due to having attempted to make sure they were all destroyed beforehand, Tails rubbed in on the failure by reminding him that a "good scientist" always checks and doublechecks his theories.

### Metal Sonic

Metal Sonic is one of Eggman's greatest creations, and his only robot that has come the closest to defeating Sonic. Despite Metal Sonic's loss to Sonic after the Little Planet incident, Eggman did not lose hope in Metal Sonic, and has since rebuilt him several times to accomplish his various agendas, even to the point of summoning the original back from Little Planet before the Death Egg mk.II incident.

In time, Eggman got betrayed by Metal Sonic during the Neo Metal Sonic incident, where the robot seized the Eggman Empire for himself to rule the world and destroy Sonic himself. It was heavily implied that Eggman regretted this outcome, as he proceeded to answer Team Chaotix's interrogation of who locked him up with a saddened tone. However, Eggman did not give up on Metal Sonic even after that, and so reprogrammed him into his obedient servant again when regaining possession of him. Although Metal Sonic still displays rebellious tendencies, it has not stopped Eggman from using him for different missions. During the 2016 Olympic Games, Eggman and Metal Sonic shared a special victory animation, where Eggman expressed his pride in the robot by patting him on the back, annoying the latter.

Owing to Eggman's narcissism, Metal Sonic was also programmed by default to lose to Eggman should they ever spar, which ultimately backfired on Eggman when trying to train him in taekwondo for the 2012 Olympic Games.

### Knuckles the Echidna

Eggman and Knuckles the Echidna were once partners, meeting each other for the first time before the Angel Island incident, where the doctor, having managed to land his Death Egg on Angel Island, tricked the echidna into believing Sonic and Tails were after the Chaos Emeralds for evil purposes. However, Eggman eventually revealed his true intentions to Knuckles by snatching the Master Emerald with his Egg Mobile and electrocuting the echidna as he tried to save the massive gem. As Knuckles noticed he had been deceived, he befriended Sonic and Tails and helped them defeat the evil scientist. Despite this, Eggman still did not give up after his defeat to the heroes, sending an EggRobo and Mecha Sonic to eliminate Knuckles, but failed.

Ever since, Eggman has become the one person that Knuckles cannot trust at all and one of his greatest enemies yet. However, due to his gullible nature, he still seems to fall for the doctor's lies. Nonetheless, Knuckles has gotten better with this over the years and is more aware of Eggman's plans, even showing a rough attitude towards the doctor in later incidents.

### Eggman Nega

Eggman Nega is Eggman's descendant from the future. The two became partners during the Sol Emerald incident to create their own Eggmanland. Sonic had even mistaken Eggman Nega for Dr. Eggman and thought that it was just a silly new disguise. However, during the Onyx Island incident, Eggman Nega turned Eggman into a card, sparking some animosity.

It is likely that their alliance fell apart at the climax of the Captain Whisker incident, when Eggman Nega nearly blew up the earth against Eggman's wishes. During the Ifrit incident, Eggman also opposed his descendant's plans and sent Metal Sonic to go after him.

### Shadow the Hedgehog

Shadow... can you hear me...? This might be the last chance I have to speak to you, so... What I said, about having created you... It was all a lie. Everyone thought you'd died during that horrible incident... but I rescued you with one of my robots... You lost your memories, that's all. You really ARE the Ultimate Life Form my grandfather created!
— Dr. Eggman, *Shadow the Hedgehog*

Since Shadow the Hedgehog was created by Eggman's grandfather, Eggman was after Shadow because he was stated as the "Ultimate Lifeform" which could help him conquer the world. When he released Shadow from his capsule, he thought that Shadow was Sonic, but then he realized that the hedgehog merely looked like his rival. He also ordered Shadow to work for him, steal all seven Chaos Emeralds, and to keep Sonic out of the way so that he would not foil his plans. Everyone was shocked when they realized that Shadow was created to kill everyone on earth, even Eggman himself.

After the Space Colony ARK incident, after Shadow was thought to have died, Eggman sent one of his robots to rescue him. However, he has seemed to have a dislike for Shadow and told him not to disturb him during the now-aborted Solaris incident. Regardless, he depended on Shadow to eliminate the Black Arms during the Black Arms incident. During both the camera incident and the Ifrit incident, Eggman turned to Shadow for help in defeating Eggman Nega. Though they still appear to be enemies whenever Eggman is the villain, Eggman does have great faith on Shadow's capabilities whenever they encounter a greater threat.

During the War to Take Back the Planet, Shadow and Eggman were portrayed as completely enemies. Eggman in particular seemed scorned by Shadow, just like he would be with Sonic, and called him a "blasted hedgehog". Despite this, however, he had no qualms with creating Phantom Copies of Shadow for his Eggman Empire.

### Orbot and Cubot

Eggman finds Orbot and Cubot to be slightly useful assistant robots but is usually annoyed through their constant mocking of him or display of stupidity. Eggman is also not a fan of when Cubot's voice chip malfunctions.

The official *Sonic Colors* website and manual both state that while Orbot obeys Eggman faithfully, he does not like him very much, while Cubot, on the other hand, likes Eggman but tries to get out of doing any work.

Although Orbot generally does not give Eggman many compliments, there have been a few instances where he was capable of acknowledging Eggman, as evident in *Sonic Forces* where, while Eggman was gloating about how with his new weapon, he would defeat Sonic and succeed in conquering the world, Orbot admitted that that time, Eggman meant "business".

### Classic Eggman

Classic Eggman is Dr. Eggman's past counterpart from another dimension. When they first met each other during the Time Eater incident, they worked together as partners to dispose of their respective Sonics. The two had a great deal of mutual respect for each other, as they both referred themselves as a "gentleman geniuses". Due to their shared defeat at the hands of Sonic at the end of the Time Eater incident however, their relationship started to deteriorate, prompting them to argue quite frequently. Classic Eggman soon lost all respect for his Modern counterpart upon learning that the latter has never defeated Sonic once.

### Gerald Robotnik

As a child, I looked up to my grandfather because of all the great things he accomplished in his life. He was my hero, and I wanted to be a great scientist like him.
— Dr. Eggman, *Sonic Adventure 2*

Eggman and Gerald Robotnik had not been known to interact with each other, although Eggman had immensely respected his grandfather, who likewise acted as the reason why he desired to become a scientist. However, his respect for his grandfather was shaken somewhat after learning of Gerald Robotnik's irrational desire of destroying all life on the planet via a collision course from the Space Colony ARK due to insanity caused by grief from Maria's death. His admiration was even further decreased when he learned from Black Doom that his grandfather had sold out the earth to the Black Arms in exchange for completing Project Shadow. However, much of his respect for his grandfather was regained when he learned about Gerald's intention of wiping out the Black Arms with the Eclipse Cannon as atonement for collaborating with them.

### The Deadly Six

I will burn your worlds, you rebellious scum! I will destroy everything you love and make you watch!
— Dr. Eggman and Zavok, *Sonic Lost World* — Sonic the Hedgehog and Dr. Eggman, *Sonic Lost World*
— Sonic the Hedgehog and Dr. Eggman, *Sonic Lost World*

The Deadly Six are some of Eggman's worst enemies. The doctor first interacted with them during the Lost Hex incident, where he invaded the Zeti's home and enslaved them with the Cacophonic Conch in an attempt to conquer Sonic's world. During this time, Eggman appeared to show very little remorse and respect for them, usually sending them to do tasks almost constantly and punishing them with the Cacophonic Conch whenever they failed to satisfy him. After the Deadly Six rebelled against Eggman, the doctor showed a great resentment towards them, as they had decided to use the Extractor, which Eggman wanted to use for his own purposes, to avenge the doctor for having abused them. In fact, at the Frozen Factory, when Zavok and Zazz mocked Eggman, Sonic and Tails on a hologram, the doctor called them "Eggman wannabes" and threatened to destroy them in a serious tone.

Despite his hatred for the Deadly Six, Eggman did form an alliance with Zavok during Dodon Pa's Grand Prix. Like during the Lost Hex incident though, the doctor showed very little respect for Zavok, calling him "pathetic" and "weak" when he disappointed him. He similarly refused to listen to him whenever the Zeti tried to say something, specially when he pointed out the doctor's poor execution of his plans.

### Infinite

Let's do it, Doctor! I'll help you change the world!
— Infinite, *Sonic Forces: Rise of Infinite* — Sonic the Hedgehog and Dr. Eggman, *Sonic Lost World*
— Sonic the Hedgehog and Dr. Eggman, *Sonic Lost World*

Infinite was one of Eggman's minions. The two first met several months before the War to Take Back the Planet, when Infinite and his squad raided the doctor's base. During this, the Phantom Ruby let Eggman see Infinite's ideal vision of the world. Impressed, Eggman offered Infinite a place in the Eggman Empire, which the latter agreed to.

Eggman seemed to respect Infinite's power and trusted him with taking care of Sonic's friends, although he did not agree with most of his actions, such as when he showed concern when Infinite let Sonic live.

### Friends/allies

* Captain Whisker
* Eggman Empire
	+ Badniks
		- E-Series
		- Master Robots
		- Metal Sonic
	+ Cubot
	+ Jackal Squad
		- Infinite
	+ Orbot
	+ SA-55
* Johnny
* SCR-GP
* SCR-HD
* Time Eater

### Neutral

* Dark Gaia
* Dr. Eggman (Classic)
* E-102 Gamma
* Eggman Nega
* Zavok

### Enemies

* Amy Rose
* Avatar
* Babylon Rogues
	+ Jet the Hawk
	+ Storm the Albatross
	+ Wave the Swallow
* Bark the Polar Bear
* Bean the Dynamite
* Big the Cat
* Biolizard
* Black Arms
	+ Black Doom
* Blaze the Cat
* Chaos
* Cheese
* Chip
* Cream the Rabbit
* Deadly Six
	+ Master Zik
	+ Zazz
	+ Zeena
	+ Zomom
	+ Zor
* Dodon Pa
* E-123 Omega
* Emerl
* Fang the Sniper
* Gemerl
* Knuckles the Echidna
* Marine the Raccoon
* Mephiles the Dark
* Metal Sonic 3.0
* Mighty the Armadillo
* Miles "Tails" Prower
* Miles "Tails" Prower (Classic)
* Princess Elise the Third
* Professor Pickle
* Ray the Flying Squirrel
* Rouge the Bat
* Shade the Echidna
* Silver the Hedgehog
* Shadow the Hedgehog
* Sonic the Hedgehog (arch-nemesis)
* Sonic the Hedgehog (Classic)
* Team Chaotix
	+ Charmy Bee
	+ Espio the Chameleon
	+ Vector the Crocodile
* Tikal
* United Federation
	+ Guardian Units of Nations
		- Commander
	+ President
* Vanilla the Rabbit
* Wisps
	+ Mother Wisp
	+ Yacker

## Trivia

* This page wasn’t expected, but we were expecting not to expect something so it doesn’t matter.