- Several terms redrect here. For other uses, see Eggman Empire (disambiguation).
The Eggman Empire (エッグマン帝国 Egguman Teikoku?), also known as the Robotnik Empire,[note 1] the Empire of Eggman, Eggmanland, the Doctor Eggman Empire, or Doctor Eggman's Empire, is a political body that appears in the Sonic the Hedgehog series. It refers to the totalitarian regime ruled by the infamous Dr. Eggman who seeks to lay claim to the entire globe. Although it has occasionally been established, the Eggman Empire has never managed to hold its ground, and merely refers to the territories Eggman has claimed and plans to claim.
In his bid to establish the Eggman Empire as the world's dominant superpower, Eggman continuously seeks to establish Eggmanland, a city from where the doctor plans to spread his rule from. Every time Eggman has hatched an evil plan for the Eggman Empire though, Sonic and his friends have been there to stop him.
The Eggman Empire is a proposed political unit that advocates a global government ruling all of Sonic's world (and possibly even all of Sonic's universe). Its capital, known as Eggmanland, is where its influence is planned to be spread from. That said, the empire appears to have a dictatorship as its form of government, in which all of the power is concentrated into Dr. Eggman. As such, the Eggman Empire is not a democracy. It is also possible that a society under the control under the Eggman Empire holds a great admiration towards Eggman's image, as evidenced by the various titles and statues honoring the doctor found in many of the empire's territories.
Noticeably, the Eggman Empire shows a total disregard for nature and prioritizes heavy industrialization, putting robotics and machinery over anything else and even advocating a world with only these two and nothing else. An illustration of a society under the control of the empire shows a grim, dark, dystopian environment filled with factories and other facilities. No signs of flora and fauna are seen in any area under Eggman's rule, and even territories that showed abundant wildlife were implied to have been heavily polluted following their annexation into the Eggman Empire. Additionally, the overwhelming pollution caused by the facilities in the empire make it impossible to breath the clean air needed to survive in nearby areas. Also, the inhabitants of the Eggman Empire are enslaved through a process known as Robotomy Treatment that turns them into mindless military robots working for Eggman. This suggests the empire runs on scientific managment and is a totalitarian state.
While the Eggman Empire refers to all the areas controlled by Dr. Eggman, the Eggman Empire in itself does not actually exist; Eggman constantly strives to establish it with various plans, several of which involve the use of Chaos Emeralds, befriending mythological deities or a combination of both. While the Eggman Empire is always establishing cities and military factories, these locations usually end up being decimated by the efforts of Sonic the Hedgehog and his allies.
The idea for the Eggman Empire was formulated by Dr. Ivo Robotnik himself. During his villainous career, Robotnik became convinced that a world ruled by his iron fist would make the world a better place and benefit all of its inhabitants. As such, he set out to conquer the earth and establish what would become the Eggman Empire. However, every one of his early plans were laid to waste by one heroic hedgehog: Sonic the Hedgehog.
Years ago, Robotnik would establish MeteorTech. Despite appearing as a legitimate weapons/security manufacturing company, Robotnik was using it to seed his robots everywhere. When ready, he would then issue a call to them to make them start a rampage that he could use to take over the world.
Sonic the Hedgehog (16-bit)
In Sonic the Hedgehog (16-bit), and its numerous ports and remasters, Dr. Robotnik learned that South Island housed powerful relics known as the Chaos Emeralds, relics which Robotnik sought to harness to help him conquer the world, presumably to create nuclear and laser-based weaponry. To help him collect the Emeralds from South Island and battle Sonic when he inevitably arrived, Robotnik created his first generation of Badniks—robots powered by Sonic's Animal friends that Robotnik had kidnapped from South Island. He would also create his first base on South Island. However, Robotnik's plans for world domination were foiled when Sonic got the Chaos Emeralds first and defeated Robotnik in the heart of his base.
Sonic the Hedgehog 2 (16-bit)
In Sonic the Hedgehog 2 (16-bit), and its numerous ports and remasters, Robotnik followed Sonic to West Side Island, where he made his next move for world domination. Discovering the Chaos Emeralds were on the island, Robotnik began turning the local Animals into Badniks to have a workforce for finding the Emeralds and constructing his ultimate weapon—the Death Egg, a massive space station to take over the planet with. It was also at the island that Robotnik created his first major stronghold for his empire—Metropolis. However, Sonic and his new ally, Miles "Tails" Prower, were able to liberate West Side Island from Robotnik's forces and make the Death Egg crash after it took into space.
Sonic the Hedgehog CD
In Sonic the Hedgehog CD, Dr. Robotnik invaded Little Planet during its annual visit to obtain its Time Stones, whose powers would let him conquer the world. Chaining the planet to the surface, Robotnik turned the planetoid into a fortress and, utilizing the planet's lack of boundaries on time, conquered the planet's past so that he could control its future. This way, Robotnik temporarily succeeded in creating his own utopia in the future world of Little Planet—this dark future was mainly a bleak post-apocalyptic world with all of Robotnik's robots being broken down and the scenery rusted and deteriorating. He also began powering his robots with seeds from Little Planet. As an extra contingency, he created Metal Sonic, a mechanical replica of Sonic, to serve as his enforcer.
Regardless of Robotnik's plans, Sonic soon arrived on Little Planet and began destroying the robot transporters Eggman had placed in the past to take control of Little Planet's future. Sonic also secured the Time Stones before Robotnik, who was eventually driven off the planet by Sonic.
In Sonic Chaos, Eggman tried to conquer the world again by stealing one of the Chaos Emeralds from South Island for his latest plot. This created an imbalance between the other Emeralds that caused the island to slowly sink. However, Sonic and Tails soon took the Emerald back, ruining Robotnik's plans.
Sonic the Hedgehog 3 & Knuckles
Sonic the Hedgehog 3
In Sonic the Hedgehog 3, Dr. Robotnik and his Death Egg had landed on Angel Island, a floating island held aloft by the Master Emerald, after Sonic and Tails made the latter crash during their adventure on West Side Island. Detecting the power of the Master Emerald, Robotnik plotted to use it to energize the Death Egg and resume his plans for world conquest. Robotnik subsequently built a base on the island to repair the Death Egg with while transforming the island and producing new Badnik workers from the island's Animals. Robotnik also met Knuckles the Echidna, the sole inhabitant and guardian of Angel Island. Passing himself off as a benevolent scientist who had come to study the Death Egg, he tricked Knuckles into thinking that Sonic and Tails were coming to the island to steal the Master Emerald. Knuckles thus aligned himself with Robotnik, thus unwillingly helping Robotnik with his plans.
Several days later, Knuckles and Robotnik would attack Sonic and Tails several times when they arrived on Angel Island in order to occupy them, allowing Robotnik to repair. Eventually, Death Egg was fully repaired, and Robotnik was able to relaunch it relatively undisturbed into the skies. However, Sonic and Tails were able to board the Death Egg in time and make Robotnik and his space station crash again after defeating Robotnik's Big Arm onboard the Death Egg.
Sonic & Knuckles
In Sonic & Knuckles, Robotnik and the Death Egg crash-landed on Angel Island again, making Robotnik resume his reconstruction efforts. Eventually stealing the Master Emerald from the Hidden Palace Zone for his Death Egg while Knuckles was occupied fighting with fighting Sonic, Robotnik was able to escape with the massive gem and use it to re-launch his space station once more. However, after the Death Egg had made it into space, Sonic and Tails would engage Robotnik and his Giant Eggman Robo, powered by the Master Emerald, onboard the Death Egg. Upon his mecha's defeat however, the Death Egg was destroyed. Robotnik then made a final attempt to escape with Master Emerald in his Final Weapon, but was defeated by Sonic. Sometime later, an Eggrobo and Mecha Sonic attempted to steal the Master Emerald, but they were stopped by Knuckles, with the unexpected help from Sonic.
Sonic the Hedgehog Triple Trouble
In Sonic the Hedgehog Triple Trouble, Dr. Robotnik had secretly acquired all the Chaos Emeralds, only to accidentally scatter them across the planet during a weapons test. After finding one of the Emeralds, Robotnik tried to get the rest before Sonic could. To this end, he tricked Knuckles into helping him with him scheme and oppose Sonic's efforts to get the Emeralds. Like before however, his plans were foiled by Sonic and Tails.
In Knuckles' Chaotix, a few months after his last trip to Angel Island, Robotnik discovered the Chaos Rings while investigating a newly formed island. Learning that these rings could help him summon the Master Emerald, which he could use to conquer the world, Eggman quickly erected a new fortress right on the mysterious island while synthesizing Dark Rings to power his army of Badniks.and rebuilding Metal Sonic. However, Robotnik's operations were ruined by Knuckles and the crew that would go on to become Team Chaotix.
In Sonic Labyrinth, Robotnik managed to cripple Sonic with his Slow Down Boots. With Sonic having been stripped of his speed and agility, and with the Chaos Emeralds in his possession, Robotnik began conquering South Island by constructing the Super Labyrinth. Using his Spin Dash however, Sonic overcame Robotnik's Super Labyrinth, took back the Emeralds, defeated Robotnik, and regained his speed.
Sonic the Fighters
In Sonic the Fighters, Robotnik had completed his Death Egg II and was ready to release its army of Badniks upon the world to conquer it. However, the fighting champion of thee world soon arrived onboard the Death Egg II, where they made it self-destruct and defeated Robotnik in battle.
Sonic 3D Blast
In Sonic 3D Blast, Robotnik targeted Flicky Island after detecting the Chaos Emeralds there. Discovering the island's unique Flickies, whose existences were closely tied to the Chaos Emeralds' locations, Robotnik put his next plan for his empire into motion. Without wasting any time, he set up a base on Flicky Island and began turning the local Flickies into Badniks that could help him retrieve the Emeralds. However, Sonic, Tails and Knuckles soon showed up and ruined Robotnik's plot.
In Sonic Blast, Robotnik tried shooting Sonic with a laser, but missed him and hit a nearby Chaos Emerald instead, causing it to shatter into several shards that spread everywhere. Pleased with the results nonetheless, Robotnik began plotting his next attempt to establish his empire by seeking out the Emerald Shards to fortify his new aerial base, the Silver Castle. However, a team-up between Sonic and Knuckles ensured that the Silver Castle was destroyed.
In Sonic R, Robotnik set up a more convoluted scheme for his next attempt to establish his global empire. By signing himself up for the World Grand Prix, Robotnik lured Sonic and his allies into participating in this event. Robotnik then planned to let the heroes find the Chaos Emeralds, which he knew were located somewhere along the racetracks, and then steal them with his robots and use them to conquer the world. At the end however, Robotnik's scheme was never realized.
In Sonic Adventure, Dr. Robotnik (referred to as "Dr. Eggman" from then on) made another attempt to establish Eggmanland, which he sought to build over the ruins of Station Square after destroying it. To do that, he released an ancient deity called Chaos from the Master Emerald and searched for the Chaos Emeralds in order to make Chaos evolve into Perfect Chaos and have it destroy Station Square. The Doctor also prepared a base called the Final Egg and the Egg Carrier battleship. However, Eggman's plans went south when Sonic and his allies ruined his operations and Chaos turned on him, leaving it to Sonic and his allies to stop Chaos.
Sonic Adventure 2
In Sonic Adventure 2, Dr. Eggman took another drastic effort to establish his "Eggman Empire" (also referred to as the "Robotnik Empire"[note 1]). Learning about the military's top secret weapon called Shadow that his grandfather, Professor Gerald Robotnik, had created, Eggman attacked Prison Island and released Shadow, who turned out to be a hedgehog and the "Ultimate Lifeform". Shadow promptly led Eggman to Space Colony ARK, where he had Eggman take control of the Eclipse Cannon, a weapon capable of destroying planets that was created by Eggman's grandfather. Eggman thus planned to supply it with Chaos Emeralds and use it to force the President to surrender, thereby establishing the Eggman Empire on a global scale. He was also joined in his campaign by Rouge the Bat, who was secretly an agent working for the government.
After getting six Chaos Emeralds, Eggman demonstrated his newfound power to the world by blowing up half of the moon, before giving the world an ultimatum: either the world surrendered itself to the Eggman Empire's rule, or Eggman would fire the Eclipse Cannon at the earth. Meanwhile, Sonic and his friends tried to thwart Eggman's plans. However, Eggman ended up saving the world alongside Sonic and his allies when his scheme to use the Eclipse Cannon led to the activation of a program onboard the Space Colony ARK installed by his grandfather that would have destroyed the planet.
Sonic Advance series
In Sonic Advance, Dr. Eggman attempted to establish the Eggman Empire by building an army of Badniks and acquiring the power of the Chaos Emeralds. He also created a base in space called the Cosmic Angel Zone. However, Sonic, Tails, Knuckles and Amy put a stop to his plans, and Eggman was defeated on the moon during a showdown with Super Sonic.
Sonic Advance 2
In Sonic Advance 2, Dr. Eggman attempted once more build the Eggman Empire by building an army of Badniks. This time however, he also kidnapped Sonic's friends and other innocent people to distract the hedgehog. He would also create the Egg Utopia space station. Sonic, however, would free his friends, who in turn helped him stop Eggman's plans for the Eggman Empire. Despite this, Eggman did not give up and thus kidnapped Vanilla, Cream's mother. However, Super Sonic took Eggman down and saved Vanilla.
Sonic Advance 3
In Sonic Advance 3, Dr. Eggman used Chaos Control to split the world into seven parts. He then planned to turn each part into an Eggman Empire in the ensuing confusion and build Eggman Land. He also created the ultimate fighting robot in the form of Gemerl from Emerl's data to help him with his scheme.
Eventually, Sonic and his allies mobilized to save the world. When they got to the Altar Emerald to fix the world with the Master Emerald, Eggman took control of the altar to secure the Master Emerald so that Sonic and his friends could not rebuild the planet. Ultimately, however, Eggman was defeated and betrayed by Gemerl, who soon became Ultimate Gemerl and left to cause chaos. Eggman thus teamed up with Super Sonic, and together they defeated Gemerl.
In Sonic Heroes, Neo Metal Sonic imprisoned Dr. Eggman and took control of the Eggman Empire in an attempt to conquer the world, establish his own robot kingdom, and finally defeat his rival Sonic for good. To this end, he mobilized Eggman's Egg Fleet to launch a full-scale assault on the world while copying the data of Team Sonic, as well as data of Team Dark, Team Rose and Team Chaotix, who got caught up in the events. At the same time, Eggman hired Team Chaotix to find and release him. In the end though, Neo Metal Sonic was defeated by the combined forces of the four teams and was reverted to his original form. Meanwhile, Eggman took back control of the Eggman Empire, although not before trying to avoid paying Team Chaotix for their services.
In Sonic Battle, Dr. Eggman got a hold of the Gizoid, an ancient battle robot that, when powered by the seven Chaos Emeralds, would help him conquer the world. Being unable to make the Gizoid respond to his commands however, Eggman threw it out after getting what he needed from it to create an army of E-121 Phis. When Sonic got a hold of the Gizoid (whom he named "Emerl") and made it work however, Eggman tried repeatedly to reacquire Emerl. To achieve this, he sent Chaos Gamma and the E-121 Phis after them. After all his attempts had failed however, Eggman decided to unveil his newest Death Egg, now equipped with the Final Egg Blaster, a laser with the power to destroy entire star clusters. Eggman then lured Emerl to the Death Egg and demonstrated the Final Egg Blaster to him in hopes that his demonstration of power would make Emerl form a Link with him. However, Emerl went out of control and had to be destroyed by Sonic.
Shadow the Hedgehog
In Shadow the Hedgehog, the Eggman Empire went into war against the Black Arms when they invaded the earth, as Eggman could not establish the Eggman Empire if the Black Arms destroyed the planet. He also had to contend with being attacked by the Guardian Units of Nations as well, making it a three-way fight between G.U.N., the Eggman Empire, and the Black Arms. During this conflict, Eggman launched his entire army of Badniks and the Eggman Fleet. Along the way, Shadow the Hedgehog would occasionally lend the Eggman Empire a hand.
In one possible scenario, Shadow, who was convinced he was an android made by Eggman, would attempt to kill the doctor whilst commanding the empire with the intent of having androids rule. At the end though, Eggman helped with the attack on the Black Comet and the eventual destruction of the Black Arms, thus saving his plans for the Eggman Empire.
Sonic Rush series
In Sonic Rush, Dr. Eggman came into contact with a man who claimed to be his counterpart from Blaze's world: Eggman Nega. Together, these two teamed up to create a universe-encompassing Eggmanland upon Sonic's world and Blaze's world. To pull off this scheme, the doctors sought the power of both the Chaos Emeralds and Sol Emeralds. In the process, they nearly caused the destruction of both universes. However, their plans for Eggmanland were foiled thanks to the combined efforts of Sonic and Blaze.
Sonic Rush Adventure
In Sonic Rush Adventure, Dr. Eggman and Eggman Nega teamed up once more to built Eggmanland, this time bringing their operations to Blaze's world. There, they sent Captain Whisker and his pirate crew out to get the Jeweled Scepter for them. However, when Whisker and his crew were defeated, Eggman and Eggman Nega stole the Jeweled Scepter themselves. They then traveled to Deep Core, where they intended to use the Power of the Stars to turn their universes into their ideal version of Eggmanland. However, Sonic and Blaze stood up to oppose them. When the heroes were close to defeating them again, Eggman Nega tried using the Jeweled Scepter to destroy the planet, much to Eggman's chagrin. Thanks to a surprise attack from Marine however, Sonic and Blaze were able to defeat the doctors and save the world.
Sonic Riders series
In Sonic Riders, Dr. Eggman discovered that the long-lost Babylon Garden hid a treasure within it that, according to a legend, was technology that he thought he could use to conquer the world and establish his empire with. Eggman thus made contact with the Babylon Rogues, who were in possession of the Key to Babylon Garden. Eggman then organized the EX World Grand Prix to collect the Chaos Emeralds, which were needed to activate the key with. Ultimately, however, Babylon Garden's treasure turned out to be just a flying carpet, which Eggman realized was useless to him and his plans.
Sonic Riders: Zero Gravity
In Sonic Riders: Zero Gravity, Dr. Eggman's plans to establish Eggmanland via MeteorTech were initiated prematurely when an Ark of the Cosmos caused the robot produced by his company to go on a rampage that Eggman could not control. Ultimately though, Eggman acquired more Arks of the Cosmos to help him regain control of his robots. Before he could use them to issue his original command on schedule, however, he was stopped by Team Sonic and the Babylon Rogues, leaving his plans with MeteorTech in shambles. Soon after, Eggman escaped when his rebellious robot SCR-HD acquired the Arks of the Cosmos and formed a black hole.
Sonic the Hedgehog (2006)
In Sonic the Hedgehog (2006). Dr. Eggman learned of the Flames of Disaster and Mephiles the Dark, both of whom were the respective halves of Solaris, a deity with the power to reshape time itself. Eggman thus sought to gain control of Solaris' power and use it to dominate the world with his empire across all of time. To this end, he sought to kidnap Princess Elise the Third, who held the Flames of Disaster inside her. He also managed to secure the Scepter of Darkness, which contained Mephiles. However, despite numerous attempts to secure both Mephiles and the Flames for himself, Eggman's plan was ultimately thwarted by Sonic and his numerous allies. Eggman would later ally himself with his enemies to help destroy Solaris when the deity was reformed and sought to destroy time. When history was later rewritten so Solaris never existed, the Eggman Empire's plans for Solaris never came to be.
Sonic Rivals series
In Sonic Rivals, Eggman Nega planned to disguise himself as Eggman and assumed his identity so he could take over the Eggman Empire in an attempt to take control of the past to ensure prosperity for himself in his time. As he executed his plan, he would turn Eggman into a card, although not before Eggman managed to sent a distress call to Shadow. Afterward, Eggman Nega went on a rampage in the present day. Soon after though, Eggman was restored and helped Shadow and Silver to stop stop Eggman Nega from turning the entire planet into a card. In the end, Eggman Nega was stopped by Sonic, Shadow, Knuckles and Silver.
Sonic Rivals 2
In Sonic Rivals 2, the Eggman Empire was taken over by Eggman Nega again, who this time used its forces and resources for his plans to unleash a monster known as the Ifrit from another dimension and have it destroy the world. Learning of Eggman Nega's plans, Eggman sent Metal Sonic out to make contact with Shadow and help him stop Eggman Nega. Ultimately, Eggman's plan succeeded, and the Ifrit was kept trapped in its dimension by numerous heroes.
Sonic Chronicles: The Dark Brotherhood
In Sonic Chronicles: The Dark Brotherhood, the Eggman Empire was put to the test when Dr. Eggman faced the combined forces of Sonic, his allies and GUN over his city of Metropolis in his Egg Carrier. In the end, Eggman disappeared when he crashed into Metropolis in his Egg Carrier, which marked the end of the Eggman Empire's threat. However, Eggman soon returned and was able to restore his empire to its former glory while Sonic and company were gone in the Twilight Cage (as a result of the time difference between earth and the Twilight Cage).
In Sonic Unleashed, Eggman launched a space armada under the guise of seeking to conquer earth. In fact though, this was all a part of a plot to lure Sonic and the seven Chaos Emeralds to his Chaos Energy Cannon. Tricking Super Sonic into the heart of the Chaos Energy Cannon, Eggman used the power of the Emeralds to break the earth into several fragments, thereby leading to the premature start of the time of awakening, where two primordial entities - Dark Gaia and Light Gaia - would clash. Eggman then ejected Sonic, who had become Sonic the Werehog in the process, from the Chaos Energy Cannon.
As the next part of his plan, Eggman sought to harness Dark Gaia's power in order to use its energies to fuel the construction efforts of Eggmanland. Although Dark Gaia's dispersion across the globe put a hamper on Eggman's plans, the doctor soon gathered enough of the beast's energies to finally build Eggmanland, which looked like a twisted mixture of a carnival and a factory, on a small continent. Unfortunately for Eggman, Eggmanland got torn down after Sonic and Chip arrived in the city. Eggmanland then seemingly collapsed in on itself when the hole leading to the earth's core that it was built upon was opened. In addition, Eggman was unable to control Dark Gaia, who swatted him away before being stopped by Sonic and Chip.
Sonic the Hedgehog 4
In Sonic the Hedgehog 4: Episode I, after defeated by Sonic following the Angel Island incident, Eggman tried a new approach for ensure world domination: by focusing on eliminating Sonic with revised Badniks, he would be able to establish his empire undisturbed. However, Eggman's efforts proved to be for naught as Sonic overcame all of his creations and eventually followed Eggman to his E.G.G. Station Zone where Sonic dealt Eggman another defeat.
At the same time, Eggman set up operations and facilities that ensured Metal Sonic would be restored and given greater power than ever. After retrieving Metal Sonic from Little Planet, Eggman brought him to Mad Gear Zone where he was repaired. Metal Sonic then went to Lost Labyrinth Zone where he retrieved a power that made him stronger than ever, before going after Sonic.
In Sonic the Hedgehog 4: Episode II, a few months after his plot to destroy Sonic failed, Eggman resurfaced on the neighboring continent for his next scheme to dominate the world with his empire. With the aid of an empowered Metal Sonic, Eggman began turning Little Planet into a fuel source for his Death Egg mk.II upon the planetoid's return to Sonic's world by building his new space station around Little Planet. Along the way, Eggman and Metal Sonic tried to destroy Sonic and Tails when they tried to stop them, but they were eventually forced to flee to the completed Death Egg mk.II, where the two villains were defeated by Sonic and Tails. In the aftermath, the Death Egg mk.II got shut down by Sonic and Tails, thus allowing Little Planet's natural orbit to pull it out of the Eggman Empire's reach.
In Sonic Colors, the Eggman Empire took over numerous planets, populated by Wisps. Dr. Eggman then began capturing the native Wisps and draining them of their powers, which were to serve as energy sources for a Mind Control Ray with which Eggman planned to brainwash the entire universe into serving him. To have easy access to the planets, Eggman dragged the planets to Sonic's world and made them a part of Dr. Eggman's Incredible Interstellar Amusement Park, which Eggman claimed to the public was built as an apology for his past misdeeds. Sonic and Tails soon discovered though that behind the benevolent façade of the park, Eggman was kidnapping the Wisps left and right.
Although Eggman got close to getting everyone on Sonic's world under his control, an energy leak in the cannon made by Sonic caused Eggman's mind control cannon to malfunction and create a black hole that destroyed the entire amusement park. Despite this, Eggman decided to destroy Sonic anyway, but was eventually defeated and left in space for a while.
In Sonic Generations, not long after his most recent scheme had failed, Eggman came across the Time Eater, an entity with the power to erase time and space. Hatching a new plan to ensure the Eggman Empire's dominance, Eggman took control of the Time Eater and began erasing Sonic's actions from history, which in turn would undo Eggman's past defeats and ensure his empire's rule over the world. As the universe fell into chaos, Eggman used the Time Eater to kidnap Sonic and his friends and sent them to White Space, a dimension without time. He then kidnapped his counterpart from a past world, whom he teamed up with to perfect the Time Eater. Ultimately, however, they were defeated when they were confronted by Modern Sonic and Classic Sonic, who destroyed the Time Eater and left the Eggmen stranded in White Space.
Sonic Lost World
In Sonic Lost World, Eggman moved his empire's operations to the Lost Hex, a floating continent where he had enslaved a group of villainous Zeti known as the Deadly Six with the Cacophonic Conch and forced them into serving as his enforcers and gathering Animals for him. There, he began building an army of Badniks for his empire to take over the world with while experimenting with his Extractor, a device he had built on the Lost Hex that could extract the world's energies, which Eggman planned to use to power his ultimate weapon. However, Eggman lost his grip on the Deadly Six when Sonic got rid of the Cacophonic Conch and had to escape the Zeti when they retaliated. Eggman and his lackeys then had to team up with Sonic and Tails to stop the Deadly Six when they took control of the Eggman Empire's forces and began using the Extractor to destroy the world. After later faking his death, Eggman tried double-crossing the heroes after the Deadly Six were defeated in an attempt to take over the remains of the world using his ultimate weapon. However, he was soon defeated by Sonic. Tails, in turn, would use Eggman's Extractor to return the energy the machine had stolen to the world, restoring it to its former self.
In Sonic Forces, Dr. Eggman found a mysterious and very powerful jewel that he dubbed the Phantom Ruby, which allowed him to control virtual reality. Soon after, Eggman made a mercenary, who would later be known as Infinite, the leader of his Eggman Army. Needing the perfect weapon to defeat Sonic and conquer the world, Eggman fused his finalized Phantom Ruby prototype with Infinite. This granted Infinite the ability to produce Phantom Copies. Using Phantom Copies of Shadow, Metal Sonic, Chaos and Zavok, Infinite defeated Sonic. After that, Eggman imprisoned Sonic onboard his Death Egg. Without Sonic to oppose the Eggman Empire, Eggman and his forces conquered 99.9% of the world over the next six months.
After imprisoning Sonic, the Eggman Empire began to implant its dominion over the world, initiating a period of wars and chaos. Several places in the world and the outer space surrounding it fell under the influence from the evil scientist. In addition, paradisaical locations like Green Hill were destroyed by desertification and then industrialization to serve as a weapons depot, while industrial areas like Chemical Plant were expanded to other regions on the planet, serving as both a chemical factory and a spaceport.
After six months of the doctor's tyrannical reign, the Eggman Empire was pushed back after Sonic broke out of prison. He, alongside Classic Sonic, the Avatar, and the Resistance, would soon after defeat Eggman and Infinite, and send the Phantom Ruby back to Classic Sonic's world, bringing an end to the empire's rule.
Armed forces and enforcers
The Eggman Empire commands a sizable proportion of military forces.
- Badniks: The Eggman Empire's brand of mass-produced robot forces. They serve as the empire's main foot soldiers. Various forces of Badniks occupy various regions of the world to supplement Eggman and his lackeys. Originally, the Badnik armies consisted exclusively of robot models based on non-anthropomorphic animals, but have over time expanded their roster to include models with more humanoid and weaponized designs. The majority of them consist of Egg Pawns.
- E-Series: The elite line of robot models among the Badnik hordes. These units are known for their greater autonomy, skillsets, and weapon capabilities.
- E-100 Series: An elite force of non-mass produced fighting robots developed by Eggman. A number of units have been destroyed and E-123 Omega is known to have defected, but a few still remain in service.
- E-1000: A line of robots that saw multiple productions of the same model, apparently inspired by E-102 Gamma.
- E-2000 Series: A mass-produced E-Series line consisting exclusively of E-2000s and E-2000Rs, transformable robots with devastating weapon and defense capabilities.
- E-10000 Series: A mass-produced E-Series line consisting of humanoid robots designed especially for Extreme Gear riding.
- Badnik doppelgangers: Highly advanced Badniks made to resemble those who have acted in opposition to the Eggman Empire. The most prominent of these robots is Metal Sonic. Lesser known models include Metal Knuckles, several models of Mecha Sonic, and Mecha Knuckles. Possibly also falling into this category is the Tails Doll.
- E-Series: The elite line of robot models among the Badnik hordes. These units are known for their greater autonomy, skillsets, and weapon capabilities.
- Eggman Army: An armed fighting force under the leadership of Infinite that served the Eggman Empire during the Phantom Ruby incident. This was the Eggman Empire's first organized army and served as the empire's main invasion force and subsequent enforces after it conquered the world on behalf of Eggman. The army was made up largely of mass-produced Phantom Copies of Shadow the Hedgehog, Zavok, Metal Sonic and Chaos. The army also used militarized Badniks, such as Egg Pawns, Moto Bugs and Buzz Bombers, and the mass-produced Death Egg Robots, as foot soldiers. The Eggman Army was rendered defunct after the source of its Phantom Copies were destroyed however.
- Freelance operatives: The Eggman Empire occasionally takes in outside criminals and agents to accomplish tasks that its standard operatives are unable to perform. However, all of them eventually left the empire due to their discontent with Eggman's traitorous or abusive ways, or due to their own personal reasons or allegiances. A few have even outright betrayed him and deliberately sabotaged his plans. Some of the freelance operatives who have served the Eggman Empire at one point or another include the Babylon Rogues, Rouge the Bat, Shadow the Hedgehog and the Deadly Six. Of these temporary partnerships, Shadow is the only one known to have assisted Eggman more than once. Even then, it is usually for personal reasons and not out of any loyalty or friendship, a testament to the doctor's extremely poor teamwork.
- Infinite: Once an infamous outlaw known as the "ultimate mercenary", Infinite became the weapon he was after a run-in with Shadow, which ended in his humiliating defeat. Horrified and disgusted at his weakness, he abandoned his old identity and pledged allegiance to Eggman, who merged him with the powerful Phantom Ruby. With this power, Infinite helped Eggman expand his empire to its largest size to date, encompassing over 99% of the entire globe at its peak with Infinite serving as the doctor's second-in-command.
Fleets and cruisers
- Egg Carrier: A large multifunctional flying fortress, and Dr. Eggman's personal flagship.
- Egg Cauldron: A floating miniature fortress armed with cannons and robot infantry.
- Eggman Fleet: The Eggman Empire's aerial assault armada that is composed of what seems like hundreds or thousands of battleships. Bristling with guns, cannons and robot armies, its power in military might remains unmatched throughout the universe. The vessels in the Eggman Fleet initially all resembled species of cartilaginous fish (either sharks or rays), but later iterations of the fleet saw that the vessels were replaced with more streamline and spaceship-like models.
- Final Fortress: A massive ship that served as the flagship of the Eggman Fleet on its maiden voyage.
- Flying Battery: A giant aircraft carrier that was used during the Angel Island incident. Another version was deployed during the Time Eater incident.
- Sky Fortress: A supergiant flying fortress made to be Eggman's final line of defense during the second Little Planet incident.
- Wing Fortress: A giant aerial fortress that surfaced during the West Side Island incident.
- Frigate Orcan and Frigate Skullian: Two frigates deployed to protect Dr. Eggman's Incredible Interstellar Amusement Park.
Piloted mechs and vehicles
The Eggman Empire has several machine units that can operate independently or with a pilot. These include:
- Atomic Destroyer Zone Boss 1: A mech vehicle equipped with a pogo mechanism.
- Atomic Destroyer Zone Boss 2: A mech vehicle equipped with a flamethrower and a cannon.
- Death Egg Robot: The signature mech of Dr. Eggman.
- Diamond Dust Zone boss: A vehicle used in Diamond Dust Zone.
- E-Mech: A miniature mech with hand-to-hand combat abilities.
- Egg Albatross: A battleship with multiple weapon attachments.
- Egg Balloon: An armored blimp with cannons.
- Egg Beetle: A beetle-based mech.
- Egg Breaker: A large mech equipped with a giant mace.
- Egg Bull: A bull-based mech that tramples over opponents.
- Egg Cannon: A vehicle that shoots black cannonballs.
- Egg Crawler: A centipede-based mech.
- Egg Dealer (first model): A mech with slot machine functions.
- Egg Dealer (second model): A hovercraft mech that drops blocks.
- Egg Devil Ray: A fish-based mech with laser weapons.
- Egg Dragoon: A dragon-based, anti-Sonic mech.
- Egg Eagle: An eagle-based mech that can fly and blow strong winds.
- Egg Emperor: An Egg Pawn-inspired mech equipped with a lance and shield.
- Egg Falcon: A falcon-based mech that attacks with fire, ice, and shrink rays.
- Egg Hammer Tank: A tank vehicle equipped with a hammer.
- Egg Hawk: A hawk-based mech brimming with gun turrets.
- Egg King: A giant humanoid mech with various weapons.
- Egg Kong: A gorilla-based mech.
- Egg Lancer: A mech made from the Egg Devil Ray and Egg Beetle.
- Egg Liner: A racecar-based vehicle equipped with a spiked ball.
- Egg Lynx: A lynx-based mech for battle on icy terrains.
- Egg Mobile: Dr. Eggman's personal hovercraft.
- Aero Egg: A modified Egg Mobile with a tail and missile launchers.
- Amazing Arena boss: A vehicle used in Amazing Arena.
- Big Arm: A modified Egg Mobile with powerful arms.
- Botanic Base boss: A vehicle used in Botanic Base.
- Brass Eggman: A modified Egg Mobile that uses musical instruments as weapons.
- Egg Hornet: A modified Egg Mobile with drills and missile launchers.
- Catch Eggman: A modified Egg Mobile equipped with electrical clamps.
- Egg Ball: A modified Egg Mobile designed to fly through pipes.
- Egg Ball No.2: A modified Egg Mobile that can roll on walls and the successor to the Egg Ball.
- Egg Bomber Tank: A modified Egg Mobile that is based on a tank.
- Egg Chaser: A modified Egg Mobile that climbs silos and is equipped with a spiked mace.
- Egg Cube: A modified Egg Mobile designed with toy-based weapons and features.
- Egg Digger: A modified Egg Mobile with drills.
- Egg Drillster: A modified Egg Mobile designed like a car with a drill up front.
- Egg Drillster Mk II: A modified Egg Mobile equipped with a drill.
- Egg Foot: A modified Egg Mobile that leaps around on legs.
- Egg Frog: A modified Egg Mobile designed to jump like a frog while firing missiles.
- Egg Froster: A modified Egg Mobile that uses ice.
- Egg Golem: A modified Egg Mobile designed like a sphinx.'
- Egg Gravitron: A modified Egg Mobile that uses electricity.
- Egg Gravity: A modified Egg Mobile that moves erratically around on a cable.
- Egg Hammer: A modified Egg Mobile with a giant hammer equipped.
- Egg Hammer 3: A modified Egg Mobile designed like a hammer, and the successor to the EggHammerTankII.
- Egg Heart: A modified Egg Mobile and the heart of the Death Egg mk.II.
- Egg Pinball: A modified Egg Mobile equipped with a ball cannon.
- Egg Poison: A modified Egg Mobile that harnesses Mega Mack.
- Egg Press: A modified Egg Mobile with a pogo string equipped.
- Egg Saucer: A modified Egg Mobile equipped to a giant wheel with spikes, a cannon, and a giant hand.
- Egg Scorcher Mk II: A modified Egg Mobile that can withstand lava and shoot fireballs.
- Egg Scorcher Mk III: A modified Egg Mobile that uses fire.
- Egg Scrambler: A modified Egg Mobile that can shoot flames.
- Egg Scrap Mech: A mech made of scrap metal and the Egg Mobile's electro magnet.
- Egg Serpentleaf: A modified Egg Mobile attached to a plant-like exo-suit.
- Egg Spider: A spider-based Egg Mobile equipped with drills.
- Egg Totem: A modified Egg Mobile that can shoot spiked disks.
- Egg-Go-Round: A modified Egg Mobile with platform (spiked and otherwise) orbiting it.
- EggHammerTankII: A modified Egg Mobile with a giant hammer equipped, and the successor to the Egg Hammer Tank.
- Eggmarine: A modified Egg Mobile designed as a submarine with a laser gun attached.
- Eggwalker: A bipedal Egg Mobile equipped with various blaster weapons.
- Flying Eggman: A modified Egg Mobile with decoys orbiting it.
- Hang Mobile: A modified Egg Mobile with a flamethrower that swings around bars.
- Hot Mobile: A modified Egg Mobile that can withstand magma and shoot spiked balls.
- Laser Walker: A bipedal Egg Mobile equipped with lasers.
- Marina Madness boss: A vehicle used in Marina Madness.
- Speed Slider boss: A vehicle used in Speed Slider.
- Techno Tower boss: A vehicle used in Techno Tower.
- Egg Phantom: A ghost-based mech with a holographic shield.
- Egg Rocket: A rocket vehicle that shoots laser beams.
- Egg Salamander: A salamander-based mech powered by the Sol Emeralds.
- Egg Snake: A snake-based vehicle with a moving cockpit.
- Egg Tilter: A vehicle used in Collision Chaos.
- Egg Turtle (first model): A sea turtle-based mech that can swim.
- Egg Turtle (second model): A turtle-based mech with an extendable neck.
- Egg Viper: A viper-based mech equipped with lasers and detachable razor-disks.
- Egg Walker: A giant mech vehicle equipped with missiles, bombs and flamethrowers.
- Egg Wizard: A wizard-based mech designed to use the Jeweled Scepter.
- Egg X: A mech equipped with a massive hand.
- EGG-HVC-001: A vehicle equipped with bumper shields.
- Egg-Wyvern: A wyvern-based mech armed with lasers and missiles.
- Eggrobo: An Eggman-based mech powered by life.
- Final Weapon: An Eggman-based vehicle.
- Gene Gadget Zone boss: A vehicle used in Gene Gadget Zone.
- Green Grove Zone boss: A vehicle used in Green Grove Zone.
- Hyper Eggrobo: A giant mech that attacks using balls and its fists.
- Metal Carrier: An armed blue aircraft piloted by Metal Sonic.
- Egg Spinner: A vehicle used in Metallic Madness.
- Nega-Wisp Armor: A Nega-Wisp-based armor that uses Hyper-go-on.
- Panic Puppet Zone boss: A vehicle used in Panic Puppet Zone.
- Egg Conveyer: A vehicle used in Quartz Quadrant.
- Spring Stadium Zone boss: A vehicle used in Spring Stadium Zone.
- Super Egg Robot: An Eggman-based mech.
- Super Eggrobo Z: An Eggman-based mech and the upgraded version of the Super Egg Robot.
- True Area 53 boss: A space vehicle equipped with missiles and freezing rays.
- Volcano Valley Zone boss: A vehicle used in Volcano Valley Zone.
- Egg Razer: A vehicle used in Wacky Workbench.
While the Eggman Empire has rarely gained a substantial amount of ground, it has still managed to build bases within certain territories that give the empire a degree of control in some parts of the world. However, its influence is kept at bay thanks to the efforts of Sonic the Hedgehog and his allies, and other forces, like GUN.
Wherever Eggman is setting his operations, there is typically a traditional decal displayed. This decal is often also seen on his robotic creations, vehicles, battleships or weaponry. Many deadly in-game obstacles and structures are known to have Eggman's decal as well. The Eggman Empire's decal is known to have the smiling face of Doctor Eggman himself, which would be also shown everywhere on his empire, if he managed to succeed with his plans.
The earliest known stylistic "EG" logo can be found on the wings and doors of Wing Fortress Zone in Sonic the Hedgehog 2, but it can also be seen on the right shoulder of Grounder and the driving seat of the Egg Typhoon from Sonic Drift. Sonic Mania continues to feature this decal as small backdrop detail found in different Zones centering on Eggman-owned industries, including Studiopolis Zone Act 2, Press Garden Zone Act 1, and Titanic Monarch Zone.
The smiling face design of Eggman is introduced in Sonic Adventure, however, depicting Dr. Eggman's classic design, despite his then recent redesign. Eggman has other decals everywhere on his hidden pyramid base in Sonic Adventure 2. Sonic Heroes features another decal on the Eggman Fleet which is also seen in Shadow the Hedgehog.
In Sonic Unleashed, a decal similar to the one in Sonic Adventure is used, but now with Eggman's modern design. A more complex decal is used for the Eggmanland flag in the same game. A refined version of the decal from Sonic Unleashed has been used since Sonic Colors. Sonic Forces introduces a much more elaborate decal while incorporating the decal from Sonic Colors, prominently featuring the Earth with mechanical arms emerging from it, and the Eggman decal beneath it with chains.
In other media
In Sonic Underground, the Eggman Empire (called the Robotnik Empire) was Dr. Robotnik's own state established in order to take control of Mobius, though he would be opposed by the Freedom Fighters. Between the nobility and the poorer inhabitants of the planet, the former were largely ignored by Robotnik (since they are the source of his money) while the latter were under the constant threat of roboticization.
In the anime series Sonic X and its comic series published by Archie Comics, the Eggman Empire is Dr. Eggman's own state that he seeks to establish worldwide, with him as the ruling head. However, he is constantly thwarted by Sonic the Hedgehog and his friends.
While on Sonic's world, Dr. Eggman sought to spread the Eggman Empire across that planet. After being transported to Earth, however, Eggman tried re-establishing the Eggman Empire there, only to fail. After Eggman and his lackeys returned to Sonic's dimension however, the Eggman Empire would be forced to join forces with Sonic and his friends in order to stop the Metarex. After defeating the aliens, Eggman decided to continue his plans of establishing his empire on Sonic's world.
Books and comics
In the Sonic the Hedgehog comic series and its spin-offs published by Archie Comics, Dr. Eggman established the Eggman Empire in order to take control of the states on Mobius that his predecessor had already conquered. However, he was opposed by several other factions, such as the United Federation and the various Freedom Fighter groups, especially the Knothole Freedom Fighters.
After the Super Genesis Wave re-wrote history, the Eggman Empire's history was modified. In this new timeline, the organization was formed by Dr. Eggman after he betrayed the Guardian Units of the Nation and started the Eggman War. However, since he started his schemes for conquering Sonic's World, he would be opposed by several other factions, most notably the Freedom Fighters. After that, its past would become almost identical to its game counterpart's.
In the Sonic the Hedgehog comic series and its spin-offs published by IDW Publishing, the Eggman Empire refers to Dr. Eggman's own state that he seeks to establish across Sonic's world. In this media, its past is virtually identical to its game counterpart's, up until after the events of Sonic Forces. After the Eggman War, Eggman went missing and his Empire was taken over by Neo Metal Sonic, who temporarily conquered Angel Island. Meanwhile, Eggman had lost his memory, but he regained it when Metal Sonic found him. Soon after, Eggman began his to infect the world with the Metal Virus, but the resulting Zombot hordes soon got out of control and fell into the hands of the Deadly Six. After the destruction of the Metal Virus, Eggman began working on his Quasi-Badnik models.
- Originally the empire was not referenced in the first main installments of the series, as Eggman's basic objectives were collecting the Chaos Emeralds, kidnapping Animals and turning them into his Badniks, or building the Death Egg in the original instruction manuals, although it is implied that building his empire would be the next step after completing his early operations. Eggmanland was first mentioned in the Japanese manual for Sonic Labyrinth, around three years before being mentioned during dialogues in Sonic Adventure.
- In Sonic Adventure 2, during the beginning scene for Hidden Base, Sonic refers to the Eggman Empire mockingly as "Emperial" in the closed captioning.
- In Sonic Adventure 2, both "Eggman Empire" and "Robotnik Empire" were used. This can be presumed as two words in the background while Eggman was broadcasting his threat.
- Sonic Team (3 May 2002). Sonic Adventure 2: Battle. Nintendo GameCube. Sega. Area/Level: Ending sequence (Dark). "Eggman: Hahahahahaha!! This completes my plan to take over the world! Now begins the glorious era of the Empire of Eggman!"
- Sora Ltd. (9 March 2008). Super Smash Bros. Brawl. Wii. Nintendo. "In-game description of the "Dr. Eggman" trophy: A self-proclaimed scientific genius. Dr. Eggman sports an IQ of 300 and wants to conquer the world and build his evil empire of Eggmanland. An expert in his field, Dr. Eggman places robotics over all else in life—a reflection of his selfish personality. He doesn't know when to quit and always comes back for more no matter how many times he is defeated by Sonic."
- Sonic Advance (Game Boy Advance) United States instruction booklet, pg. 2.
- Come Join the Eggman Empire!. YouTube. Sega (2 November 2017). Retrieved on 26 December 2021.
- Sonic Team (27 June 2003). Sonic Adventure DX: Director's Cut. Nintendo GameCube. Sega. Area: Mystic Ruins. "Eggman: Ooooh, yes! It's just as the stone tablets predicted. Ha ha ha ha ha! [Chaos'] strength increases every time I feed him a Chaos Emerald! With all 7 Emeralds in him, he'll be invincible! And work for me! Together, we'll destroy Station Square! And on its ruins, I will build Robotnikland, the ultimate city! Where I will rule it all! Come on Chaos! Let's find another Emerald, shall we?"
- Sonic Team (4 November 2011). Sonic Generations. PlayStation 3. Sega. Area/Level: Collection Room. "Dr. Eggman's profile: With an amazing 300 IQ, Dr. Eggman uses his scientific 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."
- Sonic Team (9 December 2008). Sonic Unleashed. PlayStation 3. Sega. Cutscene: Eggmanland. "Eggman: Oh ho ho ho! Welcome to Eggmanland, the brainchild of my heart and soul! This is my magnificent empire, made possible through my genius and the limitless energy harnessed from Dark Gaia!"
- Sonic Team (16 November 2010). Sonic Colors. Wii. Sega. Area/Level: Planet Wisp. "Sonic: You know, as alien as this place is, there is something very... Eggmanish about it. / Tails: I think he's transforming it somehow. Making it part of his theme park. / [...] / Sonic: It looks like the "theme" of his park is universal domination and conquest of alien races. / Tails: It's more than a theme; it's a reality. He's using them like some kind of living intergalactic gasoline. / Sonic: That's pretty low, even for a sleazeball like Eggman. / Eggman: Some displacement of indigenous aliens and destruction of natural resources may occur. Eggman Enterprises not responsible."
- Sonic Team (11 November 2010). Sonic Colors. Wii. Sega. Area: Aquarium Park. "Eggman: This exotic aquarium contains many rare and endangered species. Enjoy them with a delicious soy glaze at the Bucket O' Sushi restaurant."
- Sonic Team (25 February 2015). Sonic Runners. iOS. Sega. Area/Level: Ricky's Request. "Orbot: Uh, Boss... Should we really be dumping all the waste in the river? I think that might really mess with the local environment... / Eggman: Bah, who cares? If we ruin this area, we’ll just move the factory someplace else!"
- Sonic the Hedgehog Technical Files
- Sonic Team (11 November 2010). Sonic Colors. Wii. Sega. Area: Aquarium Park. "Eggman: Remember to try out the new and improved waterslides! Now with 20% less raw sewage!"
- Sonic Rush (Nintendo DS) United States instruction booklet, pg. 6.
- Sonic Team (18 October 2013). Sonic Lost World. Wii U. Sega. "Sonic: Whoa, over compensate much? Man, how many military factories does a guy need? / Eggman: If you weren't always destroying them, I wouldn't need so many."
- Sonic Team (25 February 2015). Sonic Runners. iOS. Sega. Cutscene: Birthday on Windy Hill. "Sonic: Time to come clean, Eggman—why are you doing all this? / Eggman: "Why"?! Isn't it obvious? I've spent my life trying to make the world a better place! Discovering lost continents, building theme parks... I should be the one getting the big birthday party, not you! / ... / Eggman: Don't be so blinkered! Look again at my good works, and you'll see they were all for the good of man and creature alike!"
- Sonic the Hedgehog (Sega Mega Drive) Japanese instruction booklet, pgs. 7-10.
- Sonic Team, CRI Middleware (22 February 2008). Sonic Riders: Zero Gravity. PlayStation 2. Sega. "Mother computer: System error detected. All commands canceled. / Eggman: My Eggman land plans are in ruins, after all these years!"
- Sonic Team, CRI Middleware (22 February 2008). Sonic Riders: Zero Gravity. PlayStation 2. Sega. "Tails: He's probably planning to use the stones' power to issue an order to all the worlds' robots from this tower. Sooner or later, he was planning to set the robots rampaging. / Amy: That was probably his reason for forming the MeteoTech in the first place. / Sonic: The Eggman Land project again, huh? He never gives up, does he?"
- Sonic The Hedgehog 4. Sega. Archived from the original on 30 May 2013. Retrieved on 26 January 2015.
- Sonic the Hedgehog 2 (Sega Mega Drive) Japanese instruction booklet, pgs. 4-8.
- Sonic the Hedgehog CD (Sega CD) Japanese instruction booklet, pgs. 4-5.
- Sonic & Tails (Sega Game Gear) Japanese instruction booklet, pgs. 4-5.
- Sonic the Hedgehog 3 (Sega Mega Drive) Japanese instruction booklet, pgs. 4-6.
- Sonic the Hedgehog 3 (Sega Mega Drive) Japanese instruction booklet pgs. 34-36.
- Sonic the Hedgehog Triple Trouble (Sega Game Gear) Japanese instruction booklet, p. 4-6.
- Sonic the Hedgehog Triple Trouble (Sega Game Gear) Japanese booklet, pg. 29.
- Knuckles' Chaotix (Sega 32X) Japanese manual, pg. 4-5.
- Sonic Labyrinth (Sega Game Gear) Japanese instruction booklet, pgs. 4-7.
- Sonic 3D Blast (Sega Genesis) North American instruction booklet, pgs. 2-3
- G Sonic (Sega Game Gear) Japanese instruction booklet, pgs. 4-7.
- Sonic R (Sega Saturn) Japanese instruction booklet, pgs. 4-5.
- Sonic Advance 2 (Game Boy Advance) United States instruction booklet, pg. 2.
- Sonic Advance 3 (Game Boy Advance) United States instruction booklet, pg. 4.
- Sonic Team, Dimps (7 June 2004). Sonic Advance. Game Boy Advance. Sega. Area/Level: Opening Sequence. "Narrator: The evil scientist, Dr. Eggman! Dr. Eggman is planning to use the Chaos Emeralds to build Eggman Land. Sonic and his friends must put a stop to his evil scheme! What will happen next?"
- Sonic Team (15 November 2005). Shadow the Hedgehog. GameCube. Sega. "Eggman: Those idiots! They're destroying everything! How can I take over the city and build the Eggman Empire if there is no city?"
- Sonic Team (15 November 2005). Shadow the Hedgehog. GameCube. Sega. Area/level: Lava Shelter. "Shadow: I am Shadow Android. The ultimate battle life form created by Eggman. You may have created me doctor, but I will now lead this empire and androids will rule! This is WHO I AM." / ... / Shadow: Goodbye, doctor!!"
- Sonic Team, Dimps (15 May 2012). Sonic the Hedgehog 4: Episode Metal. PC. Sega.
- Satoshi Okano on Twitter. Twitter (21 June 2020). Archived from the original on 21 June 2020. Retrieved on 21 June 2020.
- Sonic Team (3 May 2002). Sonic Adventure 2: Battle. Nintendo GameCube. Sega. "Sonic: I don't know what this space colony is all about but I'll find and destroy that cannon...and then kick their imperial butts!"