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This article refers specifically to the first version of Dr. Robotnik to have the Kintobor origin. For the current and most well known version, see Dr. Ivo "Eggman" Robotnik

Dr. Ivo Robotnik, formerly known as Dr. Ovi Kintobor was the main antagonist of early Sonic the Hedgehog western media. He is a mutated scientist and the embodiment of all evil in Mobius, as well as the arch-nemesis of Sonic the Hedgehog. He was formerly a benevolent scientist known as Ovi Kintobor, but after an accident, he was infused with a rotten egg and turned into the monstrous tyrant known as Ivo Robotnik, the exact opposite of his former self.

While the exact cause of the accident differs depending on the continuity, This version of Robotnik was used as the base for majority of the western Sonic media, spawning various incarnations such as the Robotnik from Sonic the Comic, who had the same origins as this Robotnik and started out being based on this version, having the exact same appearance, but slowly became a mix of other, more well known versions. He also spawned the Robotnik from the French comic book Sonic Adventures.

He was the deuteragonist-turned-main antagonist of the Sonic Bible and the Stay Sonic US Promotional comic, the main antagonist of the Sonic the Hedgehog novels published by Virgin Books, and was originally supposed to be the main antagonist of the western releases of Sonic the Hedgehog, Sonic the Hedgehog 2, and Sonic the Hedgehog 3 & Knuckles before the retcon of the Kintobor origin and Robotnik and Eggman being fused into one character in Sonic Adventure. He is also the main antagonist of the Sega Genesis version of the video game Sonic the Hedgehog Spinball, while the Adventures of Sonic the Hedgehog Robotnik is the main antagonist of the GameGear/Master System versions.

Unlike most other incarnations following this one, this incarnation of Robotnik was not a human, at least after his transformation into Robotnik. He was a mutated monster, barely having any of the humanity that his former self had.

In Japan, the character was known as Dr. Eggman, and was not called Robotnik whatsoever, and was a comedic villain, and completely human, compared to the western Robotnik, which contrasted heavily with the Japanese version.

This design of Robotnik quickly became obsolete in western Sonic media, having been replaced by the more infamous Dr. Ivo Robotnik from the Adventures of Sonic the Hedgehog cartoon as the main source of inspiration for the designs of later Robotniks in western states.


Sonic Bible

Robotnik, originally known as Ovi Kintobor, was a kind and benevolent scientist that operated in a local toxic waste dump. He was using the Cogwinder Retractable Partulent Corer to search for Chaos Emeralds, specifically the final, gray emerald. One day, he accidentally dug up a hibernating brown hedgehog named Sonny. He used a machine called the Lingua Scrambler'Um to teach Sonny how to speak human language. Kintobor explained to Sonny that he needs the Chaos Emeralds to reverse years of pollution and rid Planet Mobius of all evil, reverting it to its natural state.

Kintobor rescued many poisoned and struggling animals in his base, many of which Sonny befriended. Eventually, Kintobor appointed Sonny to be his right-hand assistant so he could help him in his search for the emeralds. Kintobor began teaching Sonny about physics, but Sonny discovered a treadmill that Kintobor had constructed. Running on it to pass the time, he eventually broke the sound barrier, crossing all known limits of acceleration and moving at the speed of light. Kintobor was alarmed, rushing to slow down the treadmill, only to find that Sonny had somehow turned blue. Kintobor began calling Sonny "Sonic" due to how fast he was moving. Sonic used his speed to further assist Kintobor in his experiments, and discovered a machine made entirely out of gold rings. He found out Kintobor had used this machine to gather all evil in Earth into six colored emeralds, and had them stored them in a cabinet.

Kintobor explained that the emeralds could eliminate all pollution from the world, or in the worst scenario, double the amount of evil in the world if they were to be hit by radiation. Unfortunately, just as he said that, a wave of pollution penetrated Mobius' surface and hit the emeralds, which made Kintobor's machine, the Retro-Orbital Chaos Compressor turn on and cast a beam on Kintobor, a half-eaten egg, and the Chaos Emeralds.

This transformed Ovi Kintobor from the benevolent, kind, scientist into a cold-blooded, wrathful beast that uses his intellect to spread more pollution and evil into the world, unlike Kintobor, who wanted to rid the world of it. The creature chased after Sonic, who grabbed many gold rings and ran out of there as fast as possible. The monster named itself Dr. Ivo Robotnik, and swore to destroy Sonic no matter what.


Robotnik is a round mutated scientist resembling an egg. He dons a messy red mustache, and for some reason, lacks eyeballs, leaving only empty gaping voids in his eye sockets. He wears a red "shirt", a yellow collar, and black pants with two white buttons on them. His attire was somehow created by the chaos energy, as Kintobor did not sport these clothes in most continuities. Unlike the Japanese Eggman, he does not wear gloves. In the Adventure Gamebook, he has large white eyes and blue pupils, but looks the same as everywhere else for the most part.

As Kintobor, his appearance is unknown, and differs depending on version. In the US Promotional comic, he wore a brown blazer with a white shirt underneath, as well as blue jeans with a black belt. He had messy white sideburns and a large white Kaiser mustache.


As Kintobor, he was a very kind and benevolent, albeit clumsy scientist, helping people in need and saving sick and poisoned animals, and using his talents to benefit others rather than himself. After his transformation into Robotnik, he became a monstrous tyrant that only cared about himself, and would do anything to destroy Sonic the Hedgehog, even going to extreme lengths to fulfill his dream to conquering Mobius for himself.

List of notable incarnations


  • The exact cause of the accident that turned Kintobor into Robotnik differs depending on continuity; In the earliest draft of the Sonic Bible, the Reverse Quantum BioFormulator casts a beam on Kintobor, the Chaos Emeralds, and a half-eaten egg that Kintobor was eating, infusing all of them into one entity known as Ivo Robotnik. The final versions of the Sonic Bible involved Kintobor mis-keying a command while distracted from the egg in his hand.
  • In some continuities, Sonic was originally an evil hedgehog known as Cinos, but was turned good by Kintobor, who was turned evil himself.
  • The Fleetway incarnation of this Robotnik was the only one that did not completely fade into obscurity.
  • Alongside the Fleetway, Sirène and Archie incarnations, this version of Eggman is one of the only ones to not be a human.
  • Even though the Japanese version is the one called Eggman, Robotnik is a literal egg-man, as he is practically an egg infused with a person.



            Sonic the Hedgehog logo.png Villains

Eggman Empire
Dr. Ivo "Eggman" Robotnik | Metal Sonic | Orbot (prototype) | Cubot | EggRobos | Lone EggRobo | Mecha Sonic | Silver Sonic | Mecha Knuckles | Badniks (Egg Pawns) | Tails Doll | Heavy King | Hard-Boiled Heavies | E-100 Alpha | E-101 Beta | Eggman Enterprises | MeteorTech | SCR-HD | Time Eater | Jackal Squad (Infinite) | Replicas Accevive Corp | Robotnik Corp | Hey Ho

Team Dark
Shadow the Hedgehog | Rouge the Bat | E-123 Omega

Babylon Rogues
Jet the Hawk | Wave the Swallow | Storm the Albatross

Eggman Nega's Forces
Eggman Nega | Metal Sonic 3.0

Deadly Six
Zavok | Zazz | Zeena | Master Zik | Zomom | Zor

Black Arms
Black Doom | Eclipse the Darkling

Mephiles the Dark | Iblis (Iblis's Minions)

Nocturnus Clan
Imperator Ix

Battle Kukku Empire
Great Battle Kukku | Battle Kukku XVI | Dr. Fukurokov

Bearenger the Bear | Fockewulf the Wolf | Carrotia the Rabbit | Witchcart

Dr. Eggman | Hard-Boiled Heavies (Heavy King, Heavy Gunner, Heavy Shinobi, Heavy Magician, Heavy Rider) | Metal Sonic

Sonic Boom
Charlie | D-Fekt | Dave the Intern | Dr. Eggman | Lyric the Last Ancient | Mark the Tapir | Metal Sonic | Morpho | Nominatus | Shadow the Hedgehog | Swifty the Shrew

Dr. Robotnik | Agent Stone | Echidna Tribe (Pachacamac) | Scavengers | Lindsey and Jason | Unit

Babylon Guardian | Biolizard | King Arthur | Boom Boos | Dr. Ivo Robotnik (USA) | Scorpius | Captain Whisker | Chaos | Dark Gaia (Dark Gaia's Minions) | Erazor Djinn | Fang the Sniper | Feist | G-merl | King Boom Boo | Ifrit | Merlina | Professor Gerald Robotnik | Pachacamac

See Also
Sonic Cartoon Villains | Sonic Comic Villains | Sonic Manga Villains | Sonic X Villains