Dr. Ivo "Eggman" Robotnik


 * NOTE: This article is about the mainstream video game version of Dr. Eggman. You can find information on other versions on the disambiguation page.

"I HATE THAT HEDGEHOG!"

- Dr. Ivo Robotnik's catchphrase. "Citizens of Earth, lend me your ears and listen to me very carefully! My name is Dr. Eggman- the world's greatest scientist, and soon to be the world's greatest ruler. Now witness the beginning of the greatest empire of all time!"

- Dr. Ivo Robotnik aka Dr. Eggman.

Dr. Ivo "Eggman" Robotnik is the main antagonist of the Sonic the Hedgehog videogame series. He is a mad genius who is bent on world domination, and the archenemy of Sonic the Hedgehog.

Over the years, Eggman's characterization has switched between him being portrayed as a serious threat, a more comedic and goofy character, an anti-hero or a mix of all. In more recent years, he has notably become more evil and unhinged, his hatred of Sonic the Hedgehog eventually taking him over and driving him to want to destroy everything in the entire world. His age is unknown, measures 185 cm. (6 ft.) and weighs 128 kg. (282 lbs.).

He is voiced by Mike Pollock in the English version, and Kotaro Nakamura in the Japanese version.

Early Games
Originally known exclusively as Dr. Ivo Robotnik in the localizations outside of Japan, Dr. Eggman did not have much of a story going for him. In the first game, he was trying to conquer South Island and create his own mechanical paradise known as Eggmanland and was eventually foiled by Sonic the Hedgehog.

In the second game of the main Genesis series, Sonic's friend Miles "Tails" Prowler joins the blue hedgehog to stop Robotnik, who has conquered West Island. Sonic eventually defeats Doctor Robotnik in a skirmish on the doctor's space station, the Death Egg. In GameGear version of Sonic the Hedgehog 2, the good doctor takes Tails for ransom, asking for 6 Chaos Emeralds in return.

In Sonic CD, Doctor Eggman arrives in a world with seven gems that can control time. Planning ahead, he created a robotic version of Sonic, dubbed Metal Sonic to keep him busy.

In the third game of the main series, after being damaged by Sonic, Eggman's space station, the Death Egg, started falling out of orbit. It lands on a floating island known as Angel Island. Here he meets Knuckles the Echidna, the last member of his tribe, who was responsible for guarding the Master Emerald, which kept the island levitating. Eggman tricks Knuckles into believing that Sonic would come to steal his emerald, and so makes him Sonic's enemy.

In Sonic and Knuckles expansion, after once again being damaged, the Death Egg falls onto Angel Island once again, and lands in a crater. As Doctor Robotnik prepares his Death Egg for a new launch, he drops a bomb on Knuckles, which infuriates him and sends on a search for Sonic.

The complete Sonic 3 & Knuckles ends with the heroes destroying Eggman's robotic creations on the Death Egg and taking the Master Emerald back from Robotnik during the Doomsday event.

Eggman has appeared as the main villain of nearly every other earlier Sonic title, such as SegaSonic the Hedgehog, Knuckles' Chaotix, Sonic Chaos, Sonic Triple Trouble, Sonic Labyrinth, Sonic the Fighters, Sonic 3D Blast, and Sonic R, with Sonic defeating Eggman at the end of each except SegaSonic the Hedgehog (in which there is no boss battle), Knuckles' Chaotix (in which Knuckles and his team fights him), and Sonic Labyrinth (in which one of Robotnik's creations is the final boss).

In Sonic Labyrinth, Eggman manages to sneak up to Sonic while he was sleeping and replaces his shoes with Slowdown shoes, ignoring the fact that he could have just destroyed Sonic right there.

Later Games
Sonic Adventure games reveal some parts of Robotnik's backstory and unite the use of his alias "Eggman" (in English versions of Sonic Adventure) and his surname "Robotnik" (Sonic Adventure 2 features first official appearance of the name "Robotnik" in Japanese versions). Sonic Adventure 2 reveals that Eggman's cousin Maria and grandfather Professor Gerald Robotnik (who was Ivo's hero and idol) were killed by the government's agents. That act was shocking for Ivo Robotnik, turning him into the terrorist, trying to destroy the government and create his own ideal Eggman Empire (and, in later games, the industrial Eggmanland).

Sonic Heroes
Metal Sonic, now known as Neo Metal Sonic, rebels against Dr. Eggman and locks him on his own flagship. In the meantime, Metal Sonic impersonates the doctor, fighting the heroes and gathering data to upgrade his own battle capabilities. The real Doctor Eggman with his voice secretly high-pitched as a cover, coordinates Team Chaotix and waits for the detectives to free him and later unites all of the teams to fight Neo Metal Sonic, also reminding them about the power of Chaos Emeralds. After Neo Metal Sonic was defeated and reverted back to his original form, Eggman attempts to sneak away from paying Vector, only to spotted by him, forcing him to run away from the now angry Team Chaotix.

Shadow the Hedgehog
Eggman is one of the main antagonists and the Eggman Empire is one of the factions which Shadow the Hedgehog can ally himself with. Dr. Robotnik can either give missions to the hedgehog or fight him as a boss. Robotnik's forces take part in defending the planet from Black Doom's alien army and the doctor himself ends cheering on the protagonist in the canonical "Last Story" ending. During the final boss (if the player continues fighting for 8–10 minutes), Eggman reveals to everyone, including Shadow, that the Shadow they've been working with since Sonic Heroes is indeed the real and original Shadow. After Black Doom is defeated, Eggman tries to go take the Chaos Emeralds, only to be chased by Knuckles.

Sonic Riders
Eggman is the main antagonist and searches for the treasure in Babylon Garden, getting the Babylon Rogues to win the Chaos Emeralds for him, however, is disappointed at the treasure being a carpet (unaware that it was a magic carpet). In Sonic Riders: Zero Gravity, he attempts to use MeteorTech robots and Arks of the Cosmos to take over the world, but they turn on him, and are destroyed by Sonic. In Sonic Free Riders, he disguises himself as "King Doc" (also called himself "King Doc of Toreggmania) and hosts a Grand Prix, having reprogrammed Metal Sonic to race for him and collect data from Sonic, Amy, Shadow, and Jet's teams, however, Metal Sonic betrays him yet again and collects the data for himself, but loses the last race to Sonic.

Sonic Rush
Eggman teams up with, seemingly, his "counterpart" from the Sol Dimension, Dr. Eggman Nega, to create an Eggmanland beyond all dimensions by abusing the Chaos Emeralds and Sol Emeralds, however, they are defeated by Sonic and Blaze. In Sonic Rush Adventure, they team up again, this time in the Sol Dimension, creating Captain Whisker to find the Jeweled Scepter for them so they can use it to awaken the Power of Stars. After Whisker is destroyed, they steal it themselves, but are defeated by Sonic and Blaze. Nega tries to use "Planet-Buster Laser" to undo the creation, but is interrupted by Marine the Racoon and ends up destroying their robotic Egg Wizard. Eggman survives and returns to the Chaos dimension.

Sonic Rivals
Eggman is imprisoned in a card by Dr. Eggman Nega, who is revealed to be Ivo Robotnik's descendant from 200 years in the future, who hates the good doctor for disrupting their line of brilliant scientists with his failures and wants him removed from the timeline. However, Eggman is released by Shadow and Silver and helps them get to Nega's base. In Sonic Rivals 2, he reprograms Metal Sonic as a mindless servant and has him team up with Shadow to stop Eggman Nega from releasing the Ifrit and destroying the world.

Sonic Unleashed
Eggman is once again the main antagonist. He awakens Dark Gaia in an attempt to take over the world and defeat Sonic. After he is defeated by Sonic and puts Dark Gaia back together, he is knocked into the distance by Dark Gaia, who will not take orders from him. He survives, however, and is last seen chasing his robot assistant Orbot into the distance for calling him a loser. The most pathetic loser in all the world, whose past efforts were utterly wasted.

Sonic Colors
Dr. Eggman is again the main antagonist and has opened an intergalactic amusement park pretending to have redeemed himself, however, he was really harvesting thousands of aliens called Wisps for use in the creation of a mind-control device which he planned on using to take control over the entire universe. When it fails, Eggman (in anger) finally snaps and decides to focus completely on killing Sonic, and attacks him with the Egg Nega Wisp (also known as Nega Wisp Armor). After his defeat, he is left in the middle of space with his robot assistants Orbot and Cubot to move his Eggmobile. This appearance has marked the first time in a 3D Sonic game to feature Eggman as the final boss.

Sonic the Hedgehog 4
which chronologically takes place after Sonic 3 and Sonic & Knuckles, Doctor Robotnik starts a new scheme, using the space station once again. Sonic defeats him, but the good doctor is not finished yet. In fact, he is about to activate Metal Sonic, one of the deadliest rivals of Sonic the Hedgehog. In Episode II, Robotnik heals Metal Sonic from his defeat in Sonic CD in Episode Metal (which takes place between Episodes 1 and II) and activates the Death Egg Mark II, but is defeated by Sonic. Oddly enough, the Badniks attack Metal Sonic. This was probably not intended by Eggman, but happened because they mistook Metal Sonic for the real Sonic, and Eggman assumed Metal Sonic could handle them. This may have been the beginning of Metal Sonic's hatred of Doctor Eggman.

Sonic Generations
In a surprise reverse twist from past 3D games, Classic and Modern Dr. "Eggman" Robotnik are not only the main antagonists, but the final bosses of Sonic Generations. Eggman finds a monstrous, supernatural entity, that he converts into a cybernetic organism, called the Time Eater, which he uses in an attempt to alter time and erase his previous defeats. He kidnaps and teams up with his past self from Sonic the Hedgehog 2, however, both Eggmans are defeated, destroying the Time Eater in the process, resulting in them being trapped in limbo, unable to escape. During this they realize they will never beat Sonic, and plan to get a teaching degree if they ever get out.

Sonic Lost World
Eggman somehow escapes limbo (and obviously does not take up a teaching degree) and tries to harness the power of the Deadly Six to take over the world, using a magic conch to torture them into submission, but they rebel against him, since Sonic took Eggman's conch and kicked it into the distance, forcing him and Sonic to work together to defeat them. After the Deadly Six are defeated, Eggman (who had faked his death during his alliance with Sonic to power a machine) turns on Sonic revealing he had been using him to defeat (and possibly kill) the Deadly Six, effectively becoming the true main antagonist. He is defeated by Sonic shortly after, and falls off the Lost Hex, seemingly to his death (though neither Sonic or Tails care, but this may be because they knew where he would land). It is revealed in the end that he survived by falling into soft dirt, but lost half his mustache due to a rabbit mistaking it for a carrot stalk while he was unconscious.

Sonic Forces
After somehow obtaining a mysterious and powerful gemstone know as the Phantom Ruby, Dr. Eggman began plans to make his biggest bid for world domination yet. Fueled by his hatred for Sonic the Hedgehog, Eggman incorporated the Phantom Ruby’s power into a disgraced squad leader and eventually converted him into his latest weapon; the enigmatic Infinite.

When his preparations were complete, Eggman commenced a worldwide assault and was soon confronted by Sonic and Tails. The doctor summons Infinite and duplicates of Sonic’s rivals to battle the blue hedgehog and seemingly succeed in destroying him. With Sonic finally gone, Eggman continued his invasion for six months with great success. Actually conquering 99% percent of the world with the remaining 1% still resisting his forces. While Eggman gave his enemies three more days to prepare for a final confrontation, The Resistance fought to weaken the Phantom Ruby's power, which was presumably being energized by the rebuilt Death Egg orbiting around the planet.

The Resistance eventually achieved in destroying the Death Egg with the help of Sonic the Hedgehog (who was revealed to be alive and well), a version of Sonic from an alternate dimension, and a remarkable new recruit usually referred to as the “Rookie”. Unfortunately, a backup generator hidden under Metropolis apparently managed to give the Phantom Ruby enough power for Eggman to have Infinite conjured up a sun and throw it at his enemies. Not only destroying the Resistance but also all other opposition on the planet’s surface. However, the Rookie used a Phantom Ruby Prototype he/she found to make the sun disappear, saving their allies and making Eggman retreat to his base.

As the heroes tackled the dangers of his base, Eggman played his trump card by installing the Phantom Ruby into a Death Egg Robot which empowers (or drains) the ruby so much that it overclocks, making the robot even more powerful than Infinite. Despite all its power however, the robot (and presumably the Phantom Ruby) was destroyed by the teamwork of both Sonic counterparts and the Rookie, thus foiling Eggman’s plans and releasing his gripping hold on the world.

Unlike in other 3D games, Eggman is not seen again following the destruction of his Death Egg Robot, so it is possible that he was destroyed along with it. However, since he has survived or escaped the destruction of previous mechs in earlier games, there is possibility he survived.

Personality
Dr. Eggman is the cruel, ruthless, cunning, arrogant, tyrannical, and manipulative ruler of Eggmanland, which consisted of several refineries, factories and industrial areas dotted across the South Island including its capital city, Scrap Brain Zone. After Sonic's victory on South Island the Doctor did not stop his aspirations, but expanded them to include the whole world, with hopes of conquering it and turning into his Eggman Empire, while also building his perfect city, shaped to appease the Doctor's ego - Eggmanland.

Robotnik has a complete disregard for anyone but himself, and is disrespectful in nature, happily mass producing his legion of robots while emitting smog into the atmosphere, and pouring oil into the oceans. His I.Q of 300 gives him a self-important personality, making him vain, egotistical, and narcissistic. However, this is his greatest weakness, as it can cause him to spend too much time being a blabbermouth, and overlooking crucial flaws in his plans. He also has an inability to see his own flaws, considering himself to be the true form of genius. Not content with world domination, Eggman aspires to have his genius run all of creation, and time itself. Realizing his robots alone aren't good enough, Eggman, in later games, decides to team up with more powerful villains than himself, usually supernatural beings. This usually backfires, and ends with utter failure. Because of his tendency's to make poor judgement, Sonic often mocks him, and Sonic and several other characters can see him as incompetent and something of a doofus. However, his goofy behavior can actually work in his favor, as it leads others to be fooled into underestimating him. Despite facing challenges, Eggman is still a serious, conniving, and materialistic guy, and while things might not work in his favor, he will work behind the scenes to make sure he comes out on top. And when everything is going his way, he is a very dangerous and valid threat to all who opposed his plans.

In many cases, Eggman is typically seen as a rival of Sonic, Tails, and Knuckles, and examples of his villainous and vituperative behavior at its worst would be in Sonic Adventure, where he took Amy hostage, and attempted to blow Sonic up; Sonic Unleashed where he lured Sonic into his trap, stunned him, then using a powerful cannon, tore the emeralds from him and used the chaos energy to crack apart the entire world, proceeding to blast Sonic into the vacuum of space; Sonic Colors, where he used a mind-controlled Tails as a living shield, hoping to turn Sonic and Tails against each other; Lost World, where he enslaved Zavok and the other Deadly Six for his own good; and Sonic Forces, when he is completely tired of Sonic and only wants him dead, he tries destroying all life so that Eggmanland can finally rule. Dr. Eggman used to have a more honorable rivalry with Sonic, and saw him as a motivation for his life in general. But in more recent years, Eggman has developed a bigger hatred for Sonic and has started taking his goals more seriously than before.

Powers and Abilities
Usually in spite of his very advanced intellect and scientific know-how (being the smartest character in the series with a recorded I.Q. of 300 (possibly higher)), he fights Sonic and his friends in attacking machinery, but he has two superpowers: super strength and super speed, the latter being somewhat contradictory and inconsistent. Eggman has been shown to be strong enough to destroy pillars, cars, and walls of ice with his fist with as much ease as Knuckles. He also has exceptional marksmanship, gunning down Tails's tornado at least twice. In addition to his mechanic skills, Eggman can also be quite manipulative, and convince people that he is a kind old soul. However, when Sonic is pitted against him, his speed, strength, marksmanship, and manipulation appeared to be poor.

Appearance
He is a tall, bald, obese human with a height of (6.1.) 185 cm (6' 1") and a Weight. 128 kg (282 lb). He has an oversized mahogany mustache, pale skin and blue eyes, as revealed in Sonic 06. He also has long lanky limbs, contrasting his fat, egg-shaped body. He possesses facial features such as a round face, pointed nose and a toothy smile. He wears grey hexagonal goggles, navy blue pince-nez glasses, white gloves, a red jacket with yellow cuffs and a white zip, and black pants and shoes.

Egg Mobile
The Egg Mobile, also known as the Egg Pod or the Egg-o-matic hovercraft, is a famous creation of Dr. Robotnik. He uses it as his personal ride for the majority of Sonic the Hedgehog games. He also uses it to fight Sonic sometimes with some add ons:


 * Wrecking Ball
 * Fireball Cannon
 * Spike
 * Mine Dropper

Metal Sonic
Arguably more dangerous than the Doctor himself, this cruel and relentless robot has an intense spite towards Sonic the Hedgehog, rivalling or exceeding Dr. Robotnik's hatred of the blue tinted insectivore. Metal Sonic was loyal to his evil creator in the 2-D games, and some of the 3-D games, but sometimes, Ivo Robotnik himself struggles to handle this metallic speed demon.

Eggman Fleet
The Eggman Fleet is an immense group of flying battleships built by Dr. Eggman. Bristling with guns, cannons and robot armies, it is capable of laying waste to nearly everything in its path. Built for the purpose of helping the evil scientist take over the world.

Egg Dragoon
The Egg Dragoon is known for being the most powerful of Eggman's creations, it has a notable size advantage against most of its enemies, it's drill is made for attacking foes, in Sonic Unleashed it uses it in order to tear the earth apart, meaning it must be extremely powerful. It can also do elemental slams with its drill.


 * Ice
 * Electricity
 * Fire

It's cannon is obviously made for shooting. The rebuilt Egg Dragoon is alot more lethal, the cannons shoot even more fire, and it can shoot ice from it's claws, it can shoot both multiple small at the same time but can as well shoot a big wave. Egg Dragoon is a highly detailed robot with alot of dragon-like details, it has dragon like wings, a drill, big claws on it's two feet, and a cannon. It's primary color is bright red, matching Dr. Eggman, but it also has light blue wings and an iron-like color on the drill and cannon. In Sonic Unleashed, Egg Dragoon is the second to last boss battle, it was heavily researched and based of on Sonic's movements, and was supposed to be the ultimate weapon to kill off Sonic. The fight it had with Sonic was intense, and it destroyed layers of the earth during the fight, but ultimately Eggman and his robot failed, and Sonic was sick of him and tore the whole robot apart and then threw Eggman away. The design in the mobile version of sonic unleashed is very different than the console version, as well as it is the final boss instead of Dark Gaia. In Sonic Generations, the Egg Dragoon is rebuilt and even more dangerous, it appeared out of nowhere really, but Sonic still managed to defeat it.

Egg Dragoon appears in the Sega video game, Sonic Forces. It is similar to how it was in the other games, except this time around, it is one of the first bosses in the game, this is interesting considering in every other game it has been one of the last boss battles. It is fought in Green Hill Zone. It is unknown if it will return later in the game.

Egg Beetle/Lancer
These two insectoid robots are fought two times in Sonic Unleased, The Egg Beetle is fought at the beginning of the game, while The Lancer is fought at the very end of the game.

The Egg Beetle, despite it's name, resembles a spider more than anything, it's lancers have a molten fire color on them. It levitates above the ground and can fly at very high speeds.

The Egg Lancer is very similar to the Egg Beetle in terms of design, except this time it has a more intimidating and fierce design, along with an even more futuristic design with multiple laser guns that it uses.

Badniks
Small, weak, but mass-produced, and attacking in large numbers, and very, very versatile, these mechanical fiends come in many great varieties and they served Doctor Robotnik and they will hunt down Sonic the Hedgehog and anyone else who opposes the "good" Doctor.

Family

 * Professor Gerald Robotnik (grandfather)
 * Maria Robotnik (cousin)
 * Eggman Nega (descendant)

Friends/Allies

 * Metal Sonic (occasionally)
 * Orbot
 * Cubot
 * Chaos (occasionally)
 * Gemerl (formerly)
 * Shadow the Hedgehog (depending on Shadow's goal)
 * Rouge the Bat (depending on Rouge's goal)
 * Eggman Nega (occasionally)
 * Time Eater
 * Deadly Six (formerly)
 * Hard-Boiled Heavies
 * Jackal Squad
 * Infinite
 * Eggman Empire

Neutral

 * Shadow the Hedgehog
 * Rouge the Bat

Enemies

 * Team Sonic
 * Sonic the Hedgehog (archenemy)
 * Miles "Tails" Prower (also a rival)
 * Knuckles the Echidna
 * Team Dark
 * Shadow the Hedgehog (sometimes)
 * Rouge the Bat (sometimes)
 * E-123 Omega (archenemy, one-sided on Omega)
 * Team Rose
 * Amy Rose
 * Cream the Rabbit
 * Cheese
 * Big the Cat
 * The Chaotix
 * Vector the Crocodile
 * Espio the Chameleon
 * Charmy Bee
 * Mighty the Armadillo
 * Ray the Flying Squirrel
 * Babylon Rogues
 * Jet the Hawk
 * Wave the Swallow
 * Storm the Albatross
 * Emerl/Gemerl
 * Silver the Hedgehog
 * Blaze the Cat
 * Marine the Raccoon
 * Eggman Nega
 * Biolizard
 * Black Doom
 * Solaris
 * G.U.N.
 * Metal Sonic (sometimes)
 * Deadly Six
 * Avatar

Theme Music
Over the years Dr. Robotnik had many musical pieces associated with him. Most of these were boss music in the classics, however, since the Sonic Adventure era the good doctor started getting distinct themes even outside of boss fights, such as Paul Shortino's "E.G.G.M.A.N." or the dark "Theme of Dr. Eggman" leitmotif which had been used since the 2006's Sonic the Hedgehog. "E.G.G.M.A.N." is considered his official and main theme, while Theme of Dr. Eggman is considered to be a warning / danger theme.

Appearances in other media

 * This article is about the video game version of Dr. Ivo "Eggman" Robotnik - you can find more information on his appearances in other media disambiguation page.

There have been five animated TV series featuring Dr. Robotnik. The first was Adventures of Sonic the Hedgehog where he was voiced by Long John Baldry. Doctor Robotnik was the series' main antagonist, being portrayed as a villain who sought to rule the planet Mobius for no reason other than the fact that he appeared to be motivated by the act of being evil. While the threat he posed to Sonic the Hedgehog and Mobius varied from episode to episode, he was generally portrayed as incompetent and immature, with a tendency to mistreat his dimwitted Badnik sidekicks Scratch and Grounder, and, many times when Sonic foils his plans, utter the catchphrase "I hate that hedgehog!". The mannerisms and catchphrases of his television counterpart has become highly memetic.

In the animated series Sonic the Hedgehog, Jim Cummings voiced Dr. Robotnik (whose real name was Julian, which was original to the Sonic the Hedgehog series). This version of Dr. Robotnik was initially portrayed as a fearsome dictator, darker and more serious than his much sillier counterpart in Adventures of Sonic the Hedgehog. Doctor Robotnik rules over his evil industrial city known as Robotropolis, and he is accompanied and joined by his two most favored allies, his robotic pet Cluck who is the only one thing he treats with compassion, and his unscrupulous nephew Snively who desires power and his uncle's downfall. As season 2 was more lighthearted than season 1, Robotnik was later depicted as an evil but incompetent villain rather than the fierce, dangerous, and intimidating foe he was originally shown to be.

Sonic Underground featured Robotnik in a style similar to the previous Sonic the Hedgehog animated series, but much more lightheartedly; he maintains less control and he is far more bumbling. He was voiced by Gary Chalk.

In the 2-episode OVA Sonic the Hedgehog: The Movie, Dr. Eggman tells Sonic that he has been banished from Robotropolis (Eggmanland in the Japanese release) by a metallic doppelgänger of himself called Metal Robotnik (Black Eggman in the Japanese release). It is later revealed that the mecha was piloted by Eggman himself, in a scheme to lure Sonic into his base and copy his DNA for his new Hyper Metal Sonic robot. Eggman was voiced by Junpei Takiguchi in the Japanese version, and by Edwin Neal in the English dub.

In Sonic X, Doctor Eggman (which he is usually referred to in this series, though his real last name in-universe is Robotnik as in the games), along with other Sonic characters, including Sonic himself, are accidentally transported from their own world (Mobius), to Earth. In the final season, Eggman returns to his universe and reluctantly joins forces with Sonic and his friends to fight the new menace called the Metarex before continues trying to build his own evil empire in his attempts .oachieve world domination This incarnation is voiced by Chikao Ōtsuka in the Japanese version, and by Mike Pollock in the English version.

Dr. Eggman appears as the primary antagonist of the Sonic Boom animated series, with Mike Pollock reprising his voice role. Eggman's physical appearance was the most drastically changed of the cast, now appearing to have a buff upper body and wearing a militaristic uniform, as well as having a fully brown and smoother mustache. He also appears to be less intelligent and much more childish than his mainstream counterpart.

Dr. Eggman also makes a brief appearance in the anime ''Hi sCoool! SeHa Girl''. In the middle of the Sega Hard Girls' first exam, Eggman hacks into the game world and begins to wreak havoc until Sonic appears to aid the girls in stopping him.

Dr. Eggman has been confirmed to appear in the untitled upcoming feature film based on the series. As the film is a live-action/CGI hybrid, it's unknown if he will be a computer-generated character or portrayed by a real actor.

When the first Sonic the Hedgehog title was released in 1991, Sega of America developed an origin for Sonic the Hedgehog and Dr. Robotnik which diverged from the back-stories created in Japan by Sonic Team. In this back-story, set on the planet Mobius, Dr. Ivo Robotnik was originally a benevolent scientist named Dr. Ovi Kintobor ("Ivo Robotnik" with the names spelt backwards; also, "ovi" is the Latin prefix meaning "egg"), a friend to Sonic who helped to develop the hedgehog's super-speed. In the Sonic the Comic, Kintobor was merged with a rotten egg and transformed into Dr. Robotnik after tripping over a cable with a rotten egg in his hand and suffering a severe electric shock. The result created Dr. Ivo Robotnik, who instantly became the opposite of the good Dr. Kintobor and would occasionally use the word "egg" in some words, with an example being "eggsactly". In the United States, a different storyline was featured in a 14-page promotional comic book written by Francis Mao and designed to promote the game. The origin story was also adopted by Sega Europe, featuring in British publications such as the book Stay Sonic and later the comic book series Sonic the Comic, which was published from 1993 until 2002. In Sonic the Comic, Dr. Robotnik was the dictatorial ruler of planet Mobius for most of the comic's first 100 issues, while Sonic also had access to an AI computer program based on the personality of Dr. Kintobor. Initially, Robotnik's appearance in Sonic the Comic matched that of the video games, but from issue 22 onwards the comic adopted his design from the Adventures of Sonic the Hedgehog cartoon show.

Also in 1993, Archie Comics began publishing its Sonic the Hedgehog comic book. The series is in a sense, a very loose continuation of ABC's Sonic the Hedgehog animated cartoon; as well as a mad scientist, Robotnik is a portrayed as an oppressive and magisterial dictator who took control of Sonic's hometown during a coup d'etat. In recent years, the plot of the comic has changed to incorporate elements from the video games, with Robotnik being replaced by his more traditional videogame counterpart.

Youtube actor DJ Hazard portrays Dr. Robotnik in the 2013 short fan-film Sonic, by Eddie Lebron. This version is more in line with his darker SatAM counterpart, being an unsympathetic, ruthless, cold, and brutal tyrant and holding a disgust towards Mobians, or "South Islanders", as they are called in the fan film. Parallel to SatAM and Archie Comics, he started off as Dr. Julian Kintobor, before deciding to become a totalitarian dictator by establishing his Eggman Empire and set out to conquer Mobius.

Quotes

 * "You know nothing, fool! It's Chaos, the god... of destruction! (maniacal laughter) - First words in Sonic Adventure.
 * "You fool, away! Before I make mincemeat out of you!" - Just before Tails' last boss fight with Eggman in Sonic Adventure.
 * "Get a load of this!" - Eggman in Sonic Adventure.
 * "No way! I can't believe this!" - Eggman in Sonic Adventure.
 * "He's not going to get away with this!" - Eggman in Sonic Adventure.
 * "All Systems, Full Power!" - Eggman in Sonic Adventure.
 * "Yes!" - Eggman in Sonic Adventure 2, completing a stage.
 * "Oh! I hate that Sonic! He always seems to get in my way!" - At the beginning of the final story in Sonic Adventure.
 * "Ah...! I let my guard down..." - Eggman in Sonic Adventure 2, after being beaten by Tails in the first Tails vs Eggman battle.
 * "No! I can't lose to Tails!" - Eggman in Sonic Adventure 2, after being beaten by Tails in the second Tails vs Eggman battle.
 * "Shadow! What are you doing? Hurry and get back here, right now, before the island blows up with you on it!" - Eggman to Shadow, right before the bomb on Prison Island goes off in Sonic Adventure 2
 * "No! That's no good! You've spoiled my plan...!" - Eggman to Rouge, with 5 seconds left on the clock in Security Hall.
 * "Better luck next time, fox-boy!" - Eggman in Sonic Adventure 2, after beating Tails in the first Tails vs Eggman battle.
 * "It's...it's my grandfather...Gerald Robotnik." - Eggman in Sonic Adventure 2 when he realizes that the Eclipse Cannon won't fire.
 * "Do you think you can beat me?" - Eggman beginning multiplayer games in Sonic Adventure 2 and both Sonic Riders games.
 * "This time I'll let you go, but the next time we meet, you might not be so lucky." - After Eggman lost to Tails in the Hero's Story of Sonic Adventure 2.
 * "Because you just told me, Fox-Boy!" - After Miles "Tails" Prower|Tails asks how Eggman knew that the Chaos Emerald he was holding was fake, in Sonic Adventure 2.
 * "If you value your life, you will tell me where Sonic and Tails are!" - Eggman threatening Amy at gunpoint in the Dark Side Story of Sonic Adventure 2.
 * "Muhahahaha! Guess what Sonic Heroes...? I've finally developed the ultimate weapon! In three days, I will conquer the world. Think you can stop me? Ahahahaha!" - Eggman announcing to Team Sonic his plans for world domination at the start of Team Sonic's story in Sonic Heroes.
 * "Hey, hold on you guys. It's no trick, and besides I plan on paying you. You'll be rewarded handsomely for helping me. As soon as I conquer the world... I WILL PAY YOU!!" - Thanking Chaotix for rescuing him.
 * "Metal Sonic has finally transformed! (...) It's useless! Metal Sonic has combined your data with the power of Chaos and is super strong! We can't defeat it. Aaa... If only we had the seven Chaos Emeralds! - Eggman in the Last Story of Sonic Heroes just after Metal Sonic transforms into Metal Madness.
 * "Those idiots! They're destroying everything! How can I take over the city and build the Eggman Empire if there IS no city!? I'm at my limit! I have no choice; send in the eggman fleet... CHARGE!!" - witnessing the black Arms attack the world.
 * "This is nonsense! You will obey me! Or there will be dire consequences!" - Eggman in Shadow the Hedgehog.
 * "I'M the one who should rule this world!" - Eggman needing to drive the Black Arms out of Earth so he can conquer the world instead in 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 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!" - Eggman confessing his lies to Shadow during the final battle against Devil Doom in Shadow the Hedgehog.
 * "You know what they say, the more the merrier!" - Eggman in the Mad Matrix Egg Breaker battle in Shadow the Hedgehog.
 * "You're going to pay for this!" - Eggman in Sonic Advance 3.
 * "I'm not finished yet" - Eggman in |Sonic the Hedgehog (2006), Sega Superstars Tennis and Sonic & Sega All-Stars Racing.
 * "Why is this happening!" - Eggman losing control of his Egg Carrier in Sonic the Hedgehog (2006).
 * "Now allow me to introduce to you my latest creation!" - Eggman after activating his All Star in Sonic & Sega All-Stars Racing and demonstrating his "Solaris prototype" to Team Heroes in Sonic 2006.
 * "Finally, I've been waiting so patiently for you to return, Princess!" - Eggman speaking to Princess Elise in Sonic the Hedgehog (2006).
 * "What do ya think of that!" - Eggman after scoring full points on shooting in Mario & Sonic at the Olympic Games.
 * "How can I let this happen?" - Eggman after losing in Mario & Sonic at the Olympic Games.
 * "All I can say is that something nearby is generating a massive electromagnetic pulse.That may have forcibly engaged the program in the robot's buffer!" - Eggman telling Sonic how his damaged robot is flying in Sonic Riders: Zero Gravity"
 * "The power units are resonating together forming a giant black hole!" - Eggman telling Sonic, Jet and friends that the Black Hole is forming in Sonic Riders: Zero Gravity"
 * "Hohoho! Success! A brilliant success!! It's just as the Gaia Manuscripts Foretold! The entity that was sealed within the planet has awakened! Now I just need to harness it power. Eggmanland will finally come to be! (laughs)" - Eggman after the whole planet splits apart in Sonic Unleashed.
 * "(Laughs), Well Sonic, prepare to be sunk!" - Eggman before battling the Egg Cauldron for the first time in Tornado Defense Act 1 in Sonic Unleashed.
 * "Energy level's dropping? Gaah, what a disaster! RETREAT!" - Eggman after defeating the Egg Cauldron in Tornado Defense Act 1 in Sonic Unleashed.
 * "(Laughs), Don't think this will be like last time!" - Eggman before battling the Egg Cauldron for the second time in Tornado Defense Act 2 in Sonic Unleashed.
 * "Gwaaaugh! Sssoniiic! Don't think you've won this!" - Eggman after defeating the Egg Cauldron in Tornado Defense Act 2 of Sonic Unleashed.
 * "Charged and ready! Begone, hedgepig!" - Eggman if the timer for battling the Egg Cauldron for the second time in Tornado Defense Act 2 expires in Sonic Unleashed.
 * "Sonic! If you have any complaints come deliver them to me in person. If you CAN, that is!" - Eggman asking Sonic to deliver his complaints to him after Sonic arrived in Eggmanland.
 * "Even you won't last long against this one!" - One of Eggman's quotes when battling the Egg Dragoon in Sonic Unleashed.
 * "Checkmate, Sonic! Hope you've said your goodbyes!" - Another of Eggman's quotes when battling the Egg Dragoon in Sonic Unleashed.
 * "You little...YOU LITTLE!!" - When Eggman takes damage while piloting the Egg Dragoon in Sonic Unleashed. (He only says the phrase a second time in the Wii version.)
 * "Yes, yes! Dark Gaia, crush that insolent, little hedgehog! Kick him into the outer limits of space!" - Eggman attempting to command Dark Gaia to attack Sonic the Werehog in Sonic Unleashed.
 * "OH, SHUT UUUUUP!!!" - Eggman venting his anger at Orbot in the ending of Sonic Unleashed.
 * "For I, the illustrious Doctor Robotnik, have completely and utterly resigned." - Eggman addressing himself as Robotnik for the first time since Sonic Adventure in Sonic Chronicles: The Dark Brotherhood.
 * "That's right, Sonic. The great Dr. Robotnik has reformed! Ha ha ha ha ha!" - Eggman in Sonic Chronicles: The Dark Brotherhood.
 * "It's cute how much you hate me." - Eggman to Sonic in Sonic Chronicles: The Dark Brotherhood.
 * "The dimensional Buffer is a fine invention. Pity I never got a chance to test it. At least not since that last time. I never did see those pants again." - Eggman talking about the Dimensional Buffer in Sonic Chronicles: the Dark Brotherhood.
 * "There is the small issue that a giant floating island crashed into my city knocking out my power grid. *sniff* My beautiful power grid." - Eggman mentioning that Angel Island crashed into Metropolis taking out the power in Sonic Chronicles: the Dark Brotherhood.
 * "Get out of my way!" - Eggman after been over taken in Mario & Sonic at the Olympic Winter Games.
 * "Lets see what you can do against this!" - Eggman after shooting gadgets in Sonic & Sega All-Stars Racing.
 * "Welcome to Eggman's incredible interstellar amusement park, where you can enjoy five planets for the price of one!"- welcoming visitors to his amusement park.
 * "Hasta la bye-bye, suckers!" - When Eggman leaves the Big Boy to take care of Sonic in Sonic Colors.
 * "Would Sonic the Hedgehog please report to the security office? Sonic the Hedgehog please report to the security office. We found your... uh... YOUR KEYS! Yes! That's it, we found your keys. No need to be ready for a trap, since we only want to return your keys." - One of Eggman's announcements during the Tropical Resort level in Sonic Colors.
 * "Would the owner of a white hovercar shaped like an egg please report to the front desk? Your car has been broken into. Repeat. Would the owner of a white hovercar shaped like an egg please report to the front desk? Your car has been broken in-- wait a minute, what the heck?!" - One of Eggman's announcements during the Tropical Resort level in Sonic Colors.
 * "Shortly, I will have no need for those idiots. In just a few hours, Sonic's world will be under my control. When it is, it will be the crown jewel of my amusement park; the GREATEST amusement park in the universe! Hoo ho ho! Ouch! I think I gloated so hard I pulled a muscle!" - Eggman demanding that he will have the last laugh in Sonic Colors.
 * "We know they look delicious, but please refrain from licking the rides. That would be disgusting." - One of Eggman announcements in Sonic Colors.
 * "Curse you, Sonic! Not only do you foil my plans, but you foil my speeches as well! I work hard on them!" - After Sonic interrupts his gloating before the final boss fight of Sonic Colors.
 * "What I wouldn't give for the maddening silence of space right now." - When Cubot was talking nonstop in the after-credit cutscene of Sonic Colors.
 * "Hehehe..... ME!" - To Orbot and Cubot telling them they the world will only have one thing on its mind, that being himself, from Sonic Colors.
 * "You. You... you...YOU! YOU HORRID LITTLE HEDGEHOG!" - Just before being defeated in Sonic Colors.
 * "No, I want you to get me a cheeseburger and a shake!" - sarcastically answering Orbot in Sonic Colors.
 * "Idiot! Get me more aliens!" - To Cubot in Sonic Colors.
 * "Me? I did nothing at all. Unless shooting him with my mind control cannon that runs on alien energy counts as doing something to him, does it?" - Eggman explaining how he controlled Tails in Sonic Colors.
 * "Take a good look at yourself, Sonic. (...) It's the last look you'll get before I close your eyes forever! Hoo hoo hoo!" - Eggman prior to the Death Egg battle in Sonic Generations.
 * "Time for a change of pace!" - During the Egg Dragoon battle in Sonic Generations.
 * "I can't believe this! I was supposed to beat you this time!" - Eggman after his Egg Dragoon is destroyed by Sonic in Sonic Generations.
 * "You're not in a position to demand ANYTHING, you nasty little pincushion! - Eggman after being confronted by Classic and Modern Sonic in Sonic Generations.
 * "After my most recent setback, I stumbled upon the primordial form of this Unique Creation. Which I discovered had amazing abilities, even I had never been able to master. It could erase time and space. I then had the brilliant idea to use my discovery to undo my previous defeats! In order to perfect it, I needed the help of someone as smart as I am. The only person that smart... is me!" - Eggman explaining about what happened after Sonic Colors and he need Robotnik's help to complete the Time Eater.
 * "...The world? I'm going to OWN the world when I'm finished with Sonic! (Maniac Laughter, coughs, and then laughs again)" - Eggman upon his encounter with Classic and Modern Sonic in Sonic Generations.
 * "Wow...Will I really get that crazy?" - Robotnik response to Eggman's laughing.
 * "We'll see who's crazy after I destroy both Sonics ... forever." - Eggman's response to Robotnik's reaction to his insane laughter.
 * "It's the exact same time as when you asked earlier, and it'll be the exact same time when you ask later. THERE IS NO TIME HERE!" - Eggman when Robotnik asks him what time it is at the end of Sonic Generations.
 * "Don't get too self-righteous; it'll be YOUR plan pretty soon!" - Eggman telling Robotnik what he did, he will do it in the future.
 * "That's not a bad idea! I always enjoyed telling people what to do!" - Eggman agreeing to Robotnik's idea about going back and getting his teaching degree.
 * "Transformation 101. Bunnies to Badniks. Boom! Instant army! It needs to be a big army if I'm taking over the world below." Eggman explaining the creation of Badniks to the Zeti in Sonic Lost World.
 * "I hone your abilities. I equip you with the most powerful mechs I can create. I even give you a giant sandwich! And you still disappoint me." - Eggman admonishing the Deadly Six in Sonic Lost World.
 * "When it's the only thing keeping six angry Zeti from controlling my mechs! You moronic hedgehog!" - Eggman after Sonic deprives him of the Cacophonic Conch he was using to control the Deadly Six in Sonic Lost World.
 * "Thanks to Sonic, everything's gone "cattywampus!"- Eggman explaining how it's Sonic's fault he lost control of the Deadly Six.
 * "I don't like working with my most hated enemies any more than you do." - Eggman allying himself with Sonic and Tails to stop the Deadly Six.
 * "If you weren't always destroying them, I wouldn't need so many." - Eggman explaining to Sonic why he builds so many military factories in Sonic Lost World.
 * "I think I liked it better when I was trying to destroy you." - Eggman when Tails insults him on the way he designed Cubot's voice chip.
 * "Actually, nothing bites more than having to listen to this dreadful conversation." - Eggman as Sonic and Tails argue about trusting him to stop the Extractor.
 * "I'll get fat from eating your black hearts, you Eggman wannabes!" - Eggman threatening Zavok and Zazz in the Frozen Factory.
 * "I'll burn your worlds you rebellious scum! I'll destroy everything you love and make you watch!" - Eggman threatening Zavok and Zazz after they rise up against him and use his Extractor to destroy Sonic's world.
 * "As long as I can still strangle a Zeti, my hands are fine." - Eggman replying to Orbot after he comments on Eggman hurting his hands.
 * "I'll find another conch, and the Zeti will be mine once again. Only next time I'll make them stronger!" - Eggman after being defeated by Sonic in Sonic Lost World.
 * "WHAT'S WRONG WITH MY MUSTACHE?!" - Eggman hearing Orbot and Cubot talking about his halved mustache at the end of Sonic Lost World.
 * "You both know you can't defeat me." - Eggman speaking to Shadow and Amy.
 * "You're history!" - Eggman before the player takes him on in Sonic Dash.
 * "We've got an intruder! Shadow has entered the facility! Defense Squad Jackal has already been completely annihilated! All available troops, intercept that blasted hedgehog by any means necessary!" - alerting a soldiers and Badniks to stop Shadow from destroying his facility.
 * "Rrrgghh! I went to great pains to get the best mercenaries around, and He's still totally wrecked the Defense Squad! SHADDDOOWWRRRGH!" - Eggman' fury for seeing Jackal Squad get harmed by Shadow.
 * "Ugh. At least the analysis of the stone was completed yesterday, but... No, I still can't let this facility be destroyed! Is there ANYONE left out there!?" - Eggman still impressed to complete the analysis of the Phantom Ruby, but still waiting fro anyone to protect his facility.
 * "Hey, you! I know you can hear me! You're the captain of Squad Jackal, aren't you?! Your squad was useless! Go clean up their mess already!" - in the Episode Shadow cutscene.
 * "Sonic, how I hate him. And all of that loathing has been focused into this invincible instrument of destruction. Every defeat, every humiliation at the hedgehog's hands will be returned a thousand-fold by my unstoppable creation. This is my dream come true. With this invention, I can expand the Eggman Empire across the globe and conquer the world!" - Eggman in the introduction of Sonic Forces.
 * "(laughs) You think you can stop the sun? You'll burn like a moth drawn to a flame! It's over!" - Eggman to the Avatar.
 * "You never fail to surprise me, Sonic. I didn't believe Infinite could lose. Victory will be so much sweeter when I defeat you. Don't think this is over yet, you blue nuisance. My plan just went into overtime!" - Eggman after watching Sonic and Avatar defeat Infinite.

Trivia

 * The character was originally designed as "Dr. Eggman" for the Japanese audience and adapted as "Dr. Ivo Robotnik" in the English release. Although references to both names, such as the "Eggman-01" designation of Wing Fortress in Sonic the Hedgehog 2 or the "Robotnik Winter" level in Sonic Triple Trouble, were present in both Japanese and English versions of the games, there was no unified canon on the naming convention until Sonic Adventure series. Sonic Adventure introduced "Eggman" as Dr. Robotnik's nickname by Sonic, which he later adopted as his own supervillain alias by Sonic Adventure 2 for the Western audiences. For the Japanese audiences, Sonic Adventure 2 introduced Gerald Robotnik and Maria Robotnik, Eggman's relatives, officially establishing "Robotnik" as his real surname in both canons, along with the words "Robotnik Empire" appearing behind Eggman during a cutscene. The character was mostly referred to as "Doctor Eggman" after that, although references to his real name still appeared from time to time.
 * The Roboticizer.jpg most well-known, yet infamous invention by Doctor Robotnik is the Roboticizer, a machine which makes living organisms, even animals, undergo the state of Roboticization, transforming them into fully mechanized robots devoid of free will. This is used in the SatAM, and Sonic Underground cartoons, and in the Archie comics. However, in the games, he puts small animals into robot shells to power them, instead of transforming flesh into robotics.
 * Eggman was originally voiced by Deem Bristow in English from Sonic Adventure to Sonic Heroes (though Bristow's voice clips were reused in Sonic Riders). In Japan, though, he was at first voiced by Masaharu Sato in SegaSonic and Chikao Otsuka from 1998 to 2015.
 * Eggman is notable for being the only character to keep his Sonic X English voice actor. All the others changed voice actors in 2010.
 * In the games, comics, and anime Sonic X, Dr. Robotnik (also called Dr. Eggman) idolizes his grandfather Professor Gerald Robotnik, and in SatAM, he cared for his robot pet Cluck. To date, Gerald Robotnik and Cluck are the only people he loves apart from himself.
 * In Sonic SatAM, Robotnik claimed to have a metallic heart. This could mean his heart is indeed cybernetic, or he may have meant this metaphorically.
 * Sonic Boom is the only franchise in which Doctor Eggman is not obese.
 * Although he is portrayed with cybernetic or mutated red eyes in the early cartoons, and in the comics, his eyes are a dark blue in Sonic '06.
 * In a 2-D artwork, Eggman is portrayed as having pencil thin arms, and no chin, but in games, he has a more masculine face, a big chin and thick muscular arms.
 * Fans of the Sonic games often debate intensely which incarnation of Doctor Robotnik is the best. Some consider the one from the Sonic SatAM cartoon to be the greatest, mainly because he appeared to be crueler than his game counterpart, and had a tight global grip over Sonic's home planet of Mobius. SatAM Robotnik fans also believe Sega's Eggman is too sympathetic to be considered a good villain, and see him as a harmless goody-good. However, many still believe the mainstream version is the greatest, as he has a comedic charm, is wildly inventive, colorful, and still can be very intelligent and cruel, as in Unleashed, he actually captured Sonic, disfigured him and shot him into space, intent on killing him, and in Sonic Adventure 2, he came very close to killing Sonic. Sega's Eggman is also cruel enough to burn up Wisps and attempt to turn everyone into mindless drones in Sonic Colors.
 * Eggman's first name 'Ivo' is simply a backwards spelling of the Latin word 'ovi' which means 'egg'.
 * Similarly, in the Archie Comics and in the Fleetway comics, his original last name is "Kintobor" which is backwards for "Robotnik".
 * "Robotnik" is an actual word, meaning "worker" or "slave" in the Slavic languages. This could explain his preference for using enslaved animals and robots as his minions.
 * A potential inhibitor of the Hedgehog signaling pathway was dubbed "Robotnikinin" in honor of Dr. Ivo "Eggman" Robotnik, while the SHH ("Sonic Hedgehog") gene/protein were named in honor of Sonic the Hedgehog.
 * His basic characteristics, such as his clip-less glasses, toothy smile, and mustache are based on the features of U.S. president Theodore Roosevelt.
 * Eggman's character design has gone through more changes than any other Sonic series character.
 * In Sonic the Comic, Robotnik is worshiped by a sinister underground cult known only as D.R.A.T., who are his fanatical "supporters" as well as called him both "The Doctor" and "The Master" and are more than willing to do everything in their power to return their "idol" to power and control over the planet Mobius and all of its inhabitants.
 * The cartoon show Adventures of Sonic the Hedgehog was the only English-speaking series prior to Sonic X to have Dr. Robotnik referred to as "Eggman" in the episode "Lifestyles of the Sick and Twisted" by Tails.
 * Also in the episode "Road Hog" of Adventures of Sonic the Hedgehog, Dr. Robotnik is referred as "The Master" by his brainwashed slaves who are under a hypnotic trance due to the Mind Pollens derived from Colonel Stench's special artificial flowers.
 * In Dr. Robotnik's Mean Bean Machine, his pupils are clearly white while on the box art and in the show, they are colored red.
 * In Mario & Sonic at the Olympic Games, Eggman is a Skill character, but in the series, he was a Power character.
 * Tails and Eggman were the only characters who are better known by their nicknames.
 * His Sonic Channel artwork was the base of two 3D-model poses: first for his Trophy in Super Smash Bros. Brawl and again for Sonic Unleashed.
 * The "Soda Can" item in Sonic Free Riders has a picture of Dr. Eggman on it.
 * Despite being the main villain of the series, Eggman has been playable in numerous games.
 * The only game he has never made an appearance on, not even a cameo was Sonic and the Black Knight. Despite this, one of the collectible items in the game, the Joker Card, has his logo on it, and the Legacy mission had his robots as enemies.
 * An unused line of Omochao's from Sonic Adventure 2 hints at the possibility that Dr. Eggman's mustache may be fake.
 * Sega did not model any eyes for Dr. Eggman's 3D model in all games except Sonic the Hedgehog (2006). In the 2006 game, his eyes are blue.
 * Eggman did not wear his goggles in Sonic the Hedgehog (2006).
 * An early version of Eggman was originally one of the choices to be the main character and even as the hero of the game that would become the first game of the Sonic the Hedgehog series.
 * There is an Internet meme from Adventures of Sonic the Hedgehog where Robotnik's line "Snooping as usual I see" was shortened into "PINGAS". This joke was even used in the Archie comics.
 * While the first name "Ivo" has never reached Japanese Eggman profiles, it did once get referenced in Sonic Jam (albeit in the English digital manual for Sonic the Hedgehog).
 * In the game of Football: Virtua Striker 3, Dr. Eggman appears in a secret team called "FC Sonic" that make up Sonic, Tails, Knuckles and Amy.
 * It is revealed in Sonic Generations that before Eggman decided to become an evil villain, he was offered a teaching degree (which Dr. Robotnik said he was going to try to get).
 * In Sonic the Hedgehog 4: Episode I, the back of the cards in Casino Street Act 2 has Eggman's face on them.
 * In every 3D main Sonic game since Sonic Unleashed, a running gag with Eggman has him shouting the word "shut up" (usually around the last cutscene).
 * However, in the second to last cutscene in Sonic Colors, he said "shut up" to his own PA announcements, which means he could be tired of his own amusement park plans failing.
 * The enormous mustache that Eggman wears in his various incarnations give him a passing resemblance to iconic Looney Tunes villain Yosemite Sam, although Eggman's is larger in size than Sam is.
 * The most recent theater poster for Walt Disney's videogame-based film Wreck-It Ralph prominently displays Dr. Eggman and Sonic on it. Eggman himself appears in the film as a cameo as well as member of the villains support group called Bad-Anon, though he does not have a speaking role.
 * His jacket resembles legendary pop singer Micheal Jackson's Thriller jacket.
 * Eggman's pose for Sonic Colors artwork is very similar to his pose in Sonic & All-Stars Racing Transformed, only with his hands in different positions.
 * Eggman's pose for Sonic Unleashed is a near identical pose to his Sonic Channel.
 * An unused quote in Sonic Colors has Eggman stating that the power of the Chaos Emeralds are weaker than the Wisps' Hyper-Go-On energy.
 * Eggman has a recurring leitmotif, outside of "E.G.G.M.A.N.". It plays in Sonic 06, Sonic Unleashed (most notably the Eggmanland's hub world theme) and in Sonic Colors (plays in cutscenes before some boss fights and while in Sonic Simulator although the latter plays the music in an 8-bit style remix). Eggman has a combined theme in Sonic 06 with Elise called "Elise Goes Alone".
 * Eggman has a huge fondness for his own food he cooks in Sonic Unleashed, especially his "Poppin' Eggcorn".
 * Eggman's ultimate ambitions appear to involve building theme parks despite having ulterior motives. Such cases are Eggmanland in Sonic Unleashed, all the parks in Sonic Colors and possibly counting Sonic Free Riders.
 * Eggman outruns Sonic in many games, such as Sonic and Knuckles and Sonic the Hedgehog 2.
 * The Eggmanland.jpg. Robotnik/Dr. Eggman along with his own namesake theme parks, share similarities with the sinister monarch King Bowser (with World Bowser and Bowser Land) from the Super Mario Bros. franchise and the all-around trash-talker Cartman (with Cartmanland) from the South Park TV series.
 * Starting with Sonic Colors, his plots now seem to be a fusion of his classic goals of kidnapping animals and his modern plots of harnessing the energies of alien and supernatural beings. In Sonic Colors, he kidnaps and drains the energies of the Wisps. In Sonic Generations, he kidnaps Sonic's friends and harnesses the Time Eater's abilities. In Lost World, he kidnaps the animals of classic games and drains the entire world's life force, while at the same time attempting to hone the Deadly Six's abilities.
 * There's a running gag that Eggman frequently finds powerful beings that he tries to control in order to take over the world, only for them to betray Eggman for their own agendas. Currently, the Time Eater and Infinite are the only ones who didn't betray Eggman at any point.
 * Like some of the other characters, Eggman's favorite food has yet to be confirmed. That said, it can be noted that in Sonic Unleashed, he is shown to have a love of submarine sandwiches as shown in a cutscene where he consumes an entire sandwich in less than 10 seconds.
 * Doc_Eggman.jpg nickname "Doc" (aside from his other alias "Doc Eggman") is a reference to the nickname of the Marvel supervillain Doctor Octopus (also known as "Doc Ock") from the Spider-Man comic books, the nickname of the time-travelling genius Dr. Emmett Brown (also known as "Doc Brown") from the Back to the Future franchise, and the famous catchphrase "what's up doc?" of the famous Loony Tunes character Bugs Bunny.
 * His other phony nickname "King Doc of Toreggmania" from Sonic Free Riders is a loose reference to the name "Trogg" (by scrambling and reassembling the non-existent name "Toreggmania" into 5 letters, "T-R-O-G-G") the creature who serves the malicious spirit known as the Evil One from the comic book series Sonic the Comic.

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