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The world is mine!

— Dr. Eggman, Sonic the Hedgehog Classic Style Guide

Doctor Ivo Robotnik,[2][3] better known as Doctor Eggman (ドクター・エッグマン Dokutā Egguman?) or Classic Eggman (クラシックエッグマン Kurashikkuegguman?), is an antagonist that appears in the Sonic the Hedgehog series. He is a human and Dr. Eggman's counterpart from another dimension set in the recent past, as well as Sonic the Hedgehog's arch-enemy.[1] Like his counterpart, he is an evil genius with an IQ of 300 who dreams of ruling the world with his army of Badniks.[4] For all his brilliance, however, Eggman's plans are constantly thwarted by Sonic and his friends, who are always around to save the day.[5][1][6]

Basically a past version of his mainstream counterpart from his younger days, Eggman first appeared during the Time Eater incident where he teamed up with his counterpart to rewrite history in his favor, only to be stopped by Classic and Modern Sonic. Since then, Eggman has continued to follow his ambitions of creating Eggman Land.


Dr. Eggman looks the same as Modern Eggman before the time of the Chaos incident. He is a human that is rotund in appearance, with black pants and leggings, white gloves, a bald head, pince-nez glasses with blue lenses, a bright red nose, and a bushy[1] mahogany mustache. He also wears a red shirt with an oversized yellow collar and cape, gray buckles on his pants, and white gloves.




Dr. Eggman began his existence as Ivo Robotnik.[2][3] At some point in the past, he allegedly followed a teaching degree, but did not get it for unknown reasons.[7] Eventually, he began to plot for world domination. However, his nemesis, Sonic the Hedgehog, would put a stop to his ambitions and ruin his plots to take over the world time and time again.[6]

SegaSonic the Hedgehog

Sometime in the past, Dr. Robotnik managed to capture Sonic, Mighty and Ray, and left them captive in Eggman Island. However, the trio eventually escaped.[8]

Sonic Generations

Modern (top) and Classic Eggman (bottom), from the console/PC version of Sonic Generations.

In the console/PC version of Sonic Generations, during the timeframe of the West Side Island incident, Eggman encountered Classic Sonic onboard the Death Egg. He then proceeded to fight Sonic in his Death Egg Robot, but was defeated. In the aftermath, Eggman got kidnapped by the Time Eater, whom he begged Sonic to save him from. As it turned out however, the Time Eater was controlled by Modern Eggman, Eggman's future counterpart from another dimension, who needed Eggman's help perfecting the Time Eater, which had the power to let both Eggmen undo their previous defeats at the hands of their worlds' native Sonic by erasing the Sonics' actions from history altogether so they would be victorious in the present. More than happy to help his counterpart realize that plan, Eggman teamed up with Modern Eggman and began helping him lure Sonic and Modern Sonic into Modern Eggman's traps.

Eventually, Sonic and Modern Sonic, along with Classic and Modern Tails, tracked Eggman and Modern Eggman down to their lair. There, the heroes found out about the Time Eater's true origin when the doctors revealed themselves and their plan, intending to dispose Sonic from time. The Eggmen proceeded to attack the Sonics with the Time Eater and managed to knock them out. However, both Sonics would transform into Super Sonic when their friends showed up to cheer them on. After enduring an intense battle, Super Sonics destroyed the Time Eater, which undid all of the Eggmen's work on rewriting history.

Finding themselves stuck in White Space, Eggman and Modern Eggman went about looking for a way out. Eventually, Eggman asked asked Modern Eggman what time it was, before the latter irritably reminded him that time does not exist in White Space. After arguing about whether or not they would ever win, Eggman thought that maybe he should instead go get his "teaching degree," to which Modern Eggman agreed as he enjoyed telling people what to do, much to Eggman's exasperation.

Sonic the Hedgehog 3 & Knuckles

In Sonic the Hedgehog 3 & Knuckles, Eggman crash-landed on Angel Island in his Death Egg. There, he tricked Knuckles the Echidna, the guardian of the island and its Master Emerald, to keep Sonic and Tails off his back while he repaired the Death Egg. When Eggman re-launched the Death Egg however, the space station was brought down to Angel Island again by Sonic and Tails. Having not given up yet however, Eggman stole the Master Emerald and used it to re-launch the Death Egg again. However, Eggman soon after got defeated by Sonic and Tails, who destroyed the Death Egg.

Sonic Mania

Eggman having trouble controlling the Hard Boiled Heavies, from Sonic Mania.

In Sonic Mania, after Sonic and Tails had defeated Eggman, the evil scientist detected a strong energy source coming from Angel Island, prompting him to send his five elite Egg-Robos, the "Hard Boiled Heavies", to go and retrieve the source. Soon after, Eggman found himself in Green Hill Zone, where he faced Sonic, Tails and Knuckles in his Death Egg Robot. He was soon defeated though, and eventually came across his Hard Boiled Heavies, who had been upgraded by the energy source. Seeing as the Heavies would no longer listen to him, Eggman took the energy source, the "Phantom Ruby," away from them and used its power to send Sonic, Tails and Knuckles, who were secretly eavesdropping on him nearby, away. The gem, however, would slowly make the doctor descend into madness.[2]

Over the next period, Eggman seized Little Planet for himself. Afterward, he began building a robotic fortress known as the Titanic Monarch on the planet. Along the way, Eggman made several attempts to stop Sonic and his group, but was defeated each time. He would also occasionally use the ruby to displace the heroes when they began catching up to him.

It was not long until Sonic, Tails and Knuckles chased Eggman down to his base inside the Titanic Monarch. However, the mad doctor was prepared for them. He fought the trio using his Phantom Ruby-empowered Phantom Egg while sending the heroes to also fight the members of the Phantom Heavies. Unfortunately for Eggman, he was still defeated. Upon his defeat, however, the Phantom Ruby sent him and Sonic to an unknown location. There, the Phantom King (the upgraded leader of the Hard Boiled Heavies, the Heavy King), stole the ruby for himself. Eggman was not prepared to give up easily though, and used his Klepto Mobile to combat his traitorous minion. In response, Sonic used the Chaos Emeralds to transform into Super Sonic to fight them both. After the Phantom King was defeated, Eggman was delivered the final blow by Super Sonic, putting his mech and his plans to ruin.

Sonic Mania Plus

In Sonic Mania Plus, some time after losing the Phantom Ruby, Eggman attacked Sonic and his group of friends in Green Hill Zone with his Death Egg Robot. Though he was soon defeated, he came across his revived Hard Boiled Heavies, who had gotten their hands on the Phantom Ruby again, in the aftermath. Seeing that the Heavies again refused to listen to him, Eggman took the Phantom Ruby from them and used its power to send Sonic and his friends, who were secretly eavesdropping on him nearby, away.

From there, Eggman retried his previous plot by capturing Little Planet once again. After that, he rebuilt the Titanic Monarch on the miniature planet. Along the way, Eggman made several attempts to stop Sonic's group, but was defeated each time. He would also occasionally use the ruby to displace the heroes when they began catching up to him.

Eventually, Eggman got chased into the Titanic Monarch by Sonic and his gang. There, the mad scientist attempted to fight the group using his Phantom Ruby-empowered Phantom Egg, but was defeated again. Upon his defeat however, the Phantom Ruby activated, creating a rift that began sucking in the surroundings. Eggman attempted to escape the rift on a jet sled, but got knocked into it by Sonic and his friends when they escaped the rift in their Super States.

Sonic Mania Adventures

Eggman gloating after capturing Sonic, from "Sonic Returns".

During Sonic's absence, Dr. Eggman managed to collect four of the Chaos Emeralds that laid buried on Angel Island.[9][10] When Sonic returned to Angel Island, Eggman made Sonic follow him to a clearing where he had set a trap for Sonic by flying over Sonic with a Capsule full of kidnapped Flickies in the Egg Mobile. Leaving the Capsule in the open, Sonic got caught in Eggman's trap when he opened the Capsule. As the Capsule turned into a timed bomb, Eggman appeared to gloat to Sonic. Eggman was then about to leave Sonic to get blown up until Sonic showed him the Chaos Emerald he had. Eggman promptly tried to steal it, but got lured into his own trap by Sonic, who proceeded to break free. Before Sonic left though, Eggman almost guilt-tripped Sonic into releasing him before his bomb could blow up. However, Eggman dropped his handheld, which revealed his plan to cheat Sonic and take his Emerald. Sonic thus accelerated the countdown on Eggman's bomb and left Eggman to have his bomb blow up in his face.[10]

Eggman preparing his evil plans involving the Tornado, from "Sonic and Tails."

Detecting the next Chaos Emerald on the island, Eggman went to excavate it. While at work, he was confronted by Sonic, but Eggman repelled Sonic with his excavation mobile. Before Eggman got the Emerald however, Sonic returned with Tails. As the heroes smacked Eggman around, the doctor almost got Sonic with his excavation mobile, only to be foiled by Tails. The two heroes then critically damaged Eggman's excavation mobile, which led to Eggman getting sent flying when his machine blew up. Landing on Angel Island's beach, Eggman discovered via a Badnik that Knuckles had the Master Emerald out in the open, and began making an evil plan that involved the Tornado.[9] Boarding the biplane, Eggman used it to take the Master Emerald while Knuckles was distracted. As Eggman flew away with the massive gem, Knuckles assumed that Sonic was behind the theft since all he could see was the hedgehog's plane taking the Emerald.[11]

Having returned to his base, Eggman gleefully witnessed the arrival of Metal Sonic (who had found the last Chaos Emerald), Sonic, Tails, Knuckles, Mighty, and Ray.[12] When Metal Sonic returned, he gave the final Chaos Emerald to Eggman. Then, upon Sonic and Tails' arrival, Metal Sonic took the duo's two Chaos Emeralds. Eggman then left Metal Sonic to harness the power of all the Chaos Emeralds and take Sonic on. Even as Mighty and Ray entered the fray, the doctor remained undeterred. However, he was shocked when Tails trapped Metal Sonic and stripped him of all the Emeralds. Despite this setback, Eggman used his backup plan by having Metal Sonic harness the power of the Master Emerald. Unfortunately, Knuckles arrived and punched both Eggman and Metal Sonic out of Eggman's lair before anything could happen.[13] Crashing in the jungle with Metal Sonic, Eggman cursed his defeat. When Metal Sonic would not work either, Eggman tried to make him rise by kicking him. When that did not work, a sour Eggman decided to abandon him in the jungle and left in a huff.[14]

Several months later, during winter, Eggman heard someone use his doorbell. When Eggman went out to check his door however, all he found was Metal Sonic with a bow on his forehead and a flower in his hand. After examining Metal Sonic and his flower, Eggman decided to take Metal Sonic back and took him into his lair.[14]

Other game appearances

Sonic Forces

In Sonic Forces, Eggman makes a cameo appearance. In this game, his face can be seen on the Goal Plates in Classic Sonic's stages until the player passes them, at which point his image will be replaced with one of Sonic.

Sonic Colors: Ultimate

In Sonic Colors: Ultimate, Dr. Eggman and his Egg Mobile make a cameo as the "Classic Eggman" profile picture that can be bought in the Customize menu for seven Park Tokens. The picture is taken from the Sonic the Hedgehog Classic Style Guide.


Dr. Eggman's profile, from the Xbox 360 version of Sonic Generations.

Much like Modern Eggman, Dr. Eggman is a short-tempered, raucous, pompous, cruel, immature and evil genius with the single desire to conquer the world.[1] To accomplish this, he uses his scientific mind to create weapons and gadgets in his bid to build "Eggman Land."[5] Arrogant and narcissistic, he constructs devastating robotic contraptions to do his evil will[1] and countless technological wonders in his own image to fuel his massive ego, like the Death Egg and the Death Egg Robot.

Like his Modern counterpart, Eggman possesses a strong confidence; despite the many defeats he has suffered at the hands of Sonic and his allies, his confidence and determination never waver.[4] However, he is more calm and collected when compared to Modern Eggman. Having seen Modern Eggman's bouts of craziness himself, he worries that he will one day go crazy too.[15] However, this has not prevented him from laughing manically at times whenever he believes he has the upper hand.[10][16]

Powers and abilities

Eggman driving the Egg Mobile, from "Sonic Returns".

Possessing an astonishing IQ of 300,[4][5] Dr. Eggman has proven himself to be just as intelligent as Modern Eggman.[15] It is stated that Eggman uses his intelligence as his primary weapon to compensate the lack of threat his appearance suggests.[1] He is a remarkable scientist and engineer, as evidenced by the numerous armies of robots of his known as Badniks, as well as by Metal Sonic, who can rival Sonic's abilities. He has also been able to build enormous bases, including gigantic metropolises such as Titanic Monarch Zone; and space stations such as the Death Egg. He is also an expert pilot, capable of driving various vehicles, including his own Egg Mobile, modifications of it, trains,[17] and the Tornado;[11] at the climax of the first Phantom Ruby incident, Eggman was even able to go toe-on-toe with the Phantom King in the Klepto Mobile.[18] In addition, he has shown some grade of coordination with his allies, such as during the Time Eater incident, where he managed to control the Time Eater alongside Modern Eggman without any problem.[19]

Aside from his intellect, Eggman has been shown to be a very durable person, having been able to survive massive explosions,[10] falls,[9] and even being sent flying away by a punch from Knuckles,[13] coming out mostly unharmed in most of these occasions. He can also be very fast, having been capable of escaping from Sonic and his friends on foot.[20]


Eggman lets his guard down very easily, specially when he is suddenly presented with an item of his interest, such as a Chaos Emerald, often leading to him falling into his own traps.[10]


Sonic the Hedgehog

Eggman and Sonic, from Sonic the Hedgehog Classic Style Guide.

I'll get you Sonic!

— Dr. Eggman, Sonic the Hedgehog Classic Style Guide

Sonic the Hedgehog is Dr. Eggman's arch-enemy. The two of them have known each other from well before the Eggman Island incident, with Sonic having thwarted the doctor's evil plans for world domination since then. Because of this, Eggman despises Sonic to the point that being able to defeat him is his definition of a victory,[7] and laughs maniacally whenever he is able to lure him into a trap.[10] Despite his hatred for the hedgehog, however, Eggman did once beg for Sonic to save him when the Time Eater abducted him due to desperation.[21]

Metal Sonic

Metal Sonic is Dr. Eggman's finest and perhaps greatest invention to date, as well as his main henchman. Although he is not above abandoning Metal Sonic like all of his other robots who have either let him down or ceased functioning, Eggman does seem to have a soft spot for Metal Sonic. Notably, he took back a broken Metal Sonic when he seemingly returned after the doctor disowned him several months prior.[14]

Modern Eggman

Eggman arguing with his modern counterpart, from the console/PC version of Sonic Generations.

I can only pray for that I don't end up like you.

— Classic Eggman, Sonic Generations (Nintendo 3DS)

Modern Eggman is Dr. Eggman's future counterpart from another dimension. When they met each other, the two of them worked together as partners to dispose of their respective Sonics. At first, it was evident that Eggman held a distinct respect for Modern Eggman, having referred to him as a "gentleman genius." However, it soon became apparent to Eggman that his modern counterpart was a few bolts short of a robot after seeing him break down into a hysterical laughter, which made Eggman worry about whether or not he was destined to end up as him one day. Furthermore, Eggman disliked being left out of Modern Eggman's rants, like when Modern Eggman gloated about destroying the Sonics himself when they were supposed to do it together. Their relationship further deteriorated after their shared defeat at the end of the Time Eater incident. Eggman in particular lost all respect for Modern Eggman, particularly after learning that he never once defeated Sonic.




In other media

Books and comics

IDW Publishing

Dr. Eggman, from Sonic the Hedgehog 30th Anniversary Special.

In the Sonic the Hedgehog comic series and its spin-offs published by IDW Publishing, Dr. Eggman is Eggman's counterpart from another dimension set in the recent past. Like his counterpart, Eggman is an evil scientist who seeks to take over the world using his army of Badniks. His past is nearly indistinguishable from his game counterpart's, up until after the events of Sonic Mania.


"Think you can beat me?"
—Dr. Eggman, Sonic the Hedgehog Classic Style Guide

See also


  1. 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 Jonod (3 November 2014). A Not so Little Look at: Sonic The Hedgehog 2014 Classic Style Guide. Sonic Stadium. Archived from the original on 25 July 2015. Retrieved on 29 January 2022.
  2. 2.0 2.1 2.2 Sonic the Hedgehog (20 October 2017). Sonic Mania OST - Dr. Eggman Boss 1. YouTube. Retrieved on 7 April 2022. "The Nefarious Dr. Ivo "Eggman" Robotnik got his hands on some new type of mysterious gem and now he's gone a bit deranged. Enjoy the chaotic rhythm as he slowly descends into a new madness. He's pulling out all the stops this time!"
  3. 3.0 3.1 Sonic Team (4 November 2011). Sonic Generations. PlayStation 3. Sega. Cutscene: The Final Battle!. "Modern Eggman: You're not in a position to demand anything, you nasty little pincushion! / Modern Tails: Eggman! But, how? / Classic Eggman: He had a little help. / Classic Tails: Dr. Robotnik! Classic Eggman: Nobody calls me that anymore."
  4. 4.0 4.1 4.2 Sega. "Characters". Sonic Mania Introduction Manual. Sega. p. 2. "An evil genius with an IQ of 300, Dr. Eggman won't stop until he dominates the world with his army of mechanized minions. Despite suffering defeats at the hands of Sonic and his friends, Dr. Eggman's confidence never wavers. Intrigued by this new energy signal, he plans to exploit it for his own means. With something this powerful, he could finally stop Sonic forever."
  5. 5.0 5.1 5.2 Sonic Team (4 November 2011). Sonic Generations. PlayStation 3. Sega. Area/Level: Collection Room. "Dr. Eggman's character profile: With an amazing 300 IQ, Dr. Eggman uses his scientific genius and robotic expertise to create weapons and gadgets in his bid to take over the world and build "Eggman Land."

    However, Dr. Eggman's schemes are foiled at every turn by Sonic and his friends."
  6. 6.0 6.1 Sonic Mania (PC) English instruction manual, "Characters".
  7. 7.0 7.1 Sonic Team (4 November 2011). Sonic Generations. PlayStation 3. Sega. Cutscene: Trapped.
  8. Webber, Aaron. The Art of Sonic Mania. Sega. p. 6. "When Mighty and Ray last saw Sonic, they were escaping from Eggman Island. Time may have passed, but this duo are ready to prove they can take down the Doctor again!"
  9. 9.0 9.1 9.2 Hesse, Tyson (30 April 2018). "Sonic and Tails". Sonic Mania Adventures. Season 1. Episode 2. YouTube.
  10. 10.0 10.1 10.2 10.3 10.4 10.5 Hesse, Tyson (30 March 2018). "Sonic Returns". Sonic Mania Adventures. Season 1. Episode 1. YouTube.
  11. 11.0 11.1 Hesse, Tyson (31 May 2018). "& Knuckles". Sonic Mania Adventures. Season 1. Episode 3. YouTube.
  12. Hesse, Tyson (22 June 2018). "Mighty and Ray". Sonic Mania Adventures. Season 1. Episode 4. YouTube.
  13. 13.0 13.1 Hesse, Tyson (17 July 2018). "Metal Mayhem". Sonic Mania Adventures. Season 1. Episode 5. YouTube.
  14. 14.0 14.1 14.2 Hesse, Tyson (20 December 2018). "From: A. Rose". Sonic Mania Adventures. Season 1. Episode 6. YouTube.
  15. 15.0 15.1 Sonic Team (4 November 2011). Sonic Generations. PlayStation 3. Sega. Cutscene: The Final Battle!
  16. Sonic Team (4 November 2011). Sonic Generations. Nintendo 3DS. Sega. Cutscene: Event 11. "Modern Eggman: The world? I'm going to OWN the world when I'm finished with Sonic! OH HO HO HO HO HO HO HO! / Classic Eggman: You mean WE'RE going to own the world! OH HO HO HO HO HO HO HO!"
  17. Christian Whitehead, Headcannon, PagodaWest Games, Tantalus Media (15 August 2017). Sonic Mania. Nintendo Switch. Sega. Area/Level: Mirage Saloon Zone Act 1 (Sonic's playthrough).
  18. Christian Whitehead, Headcannon, PagodaWest Games, Tantalus Media (15 August 2017). Sonic Mania. Nintendo Switch. Sega. Area/Level: Egg Reverie Zone.
  19. Sonic Team (4 November 2011). Sonic Generations. PlayStation 3. Sega. Area/Level: Time Eater.
  20. Christian Whitehead, Headcannon, PagodaWest Games, Tantalus Media (15 August 2017). Sonic Mania. Nintendo Switch. Sega. Area/Level: Metallic Madness Zone Act 2.
  21. Sonic Team (4 November 2011). Sonic Generations. PlayStation 3. Sega. Cutscene: Eggman Abducted. "Classic Eggman: What?! No! No! Sonic! Save me!"