Eggman Empire

''Robotnikland redirects here. For the episode, see Robotnikland (episode)''

The Eggman Empire (エッグマン帝国 Egguman Teikoku) is the Empire of scientists and robots. The Eggman Empire is never built, or seen. Sonic Unleashed was the most recent game to feature the Eggman Empire. The early cartoons and Archie comics use the name Robotropolis (though the comics later adopted the name when an alternate version of Robotnik appeared).

In Sonic Adventure 2 the name "Eggman Empire" was used. This can be prosumed as two words in the background while Eggman was broadcasting his threat. Also, in the Dark Story, a scene is called "Eggman Empire".

Sonic X and Shadow the Hedgehog also use the name Eggman Empire. In the Japanese dub of the movie, his home city is called Eggmanland, while in the English dub it is called Robotropolis.

In Shadow the Hedgehog Eggman Empire is one of the factions that Shadow can align himself with along with GUN and Black Arms. When fighting for the Eggman Empire Shadow is guided by Eggman who communicates with him from a Flying TV like apparatus.

In the world of the Sonic the Hedgehog video game series, Eggmanland (エッグマンランド known as Robotnikland, Robotnik Empire or Robotropolis and also known as the Eggman Empire) is a land that Sonic the Hedgehog's nemesis, Dr. Eggman, often speaks of. In some continuities it is a land that he has already established; in others he only has plans for it. In most continuities, Eggmanland takes on the form of a technocratic dictatorship, with Dr. Eggman himself as the self-appointed Head of State. In general, as far as the social order of each continuity's Eggmanland spans out, robots and scientists employed by Eggman are granted greater social status than that of other Humans and Mobians.

Video games
In the video game and Sonic X continuities, The Capital of the Eggman Empire does not actually exist; Eggman constantly strives to found it with various plans, several of which involve the use of Chaos Emeralds, the technology of his grandfather Gerald Robotnik, or both. In Sonic CD, Dr. Ivo Robotnik temporarily succeeds in creating a complete "Robotnikland" in the future world of the Little Planet by altering the past - this dark future is mainly a bleak post-apocalyptic world with all of Robotnik's robots being broken down and the scenery rusted and deteriorating. This could either mean two things: Robotnik's desired utopia is doomed to failure or he doesn't care what the planet looks like, as long as it's under his control. However, while he himself may not be able to complete Eggmanland, it was shown in Sonic Rush, that his "alter ego", Eggman Nega, has completed it. In Sonic Unleashed, Eggmanland does exist as one of the game's stages, created through the power of Dark Gaia and looking like a twisted mixture of a carnival and a factory. In Sonic Chronicles: The Dark Brotherhood, it is shown in the cliff-hanger ending that he has finally achieved his "empire" while Sonic and company were in the Twilight Cage as a result of the time difference between the two areas.

Adventures of Sonic the Hedgehog
In the Adventures of Sonic the Hedgehog, Robotnik has his own base of operations, a fortress located apon a hill with a large yellow or gold statue with hand salute.

In the episode "Robotnikland", Dr. Robotnik takes over an amusement park called Mobiusland and renames this as Robotnikland, which he reprograms the rides to form a death trap. Sonic visits Robotnikland on his birthday as a trick by Scratch and Grounder.

Archie Comics/SatAM
In the Archie-published Sonic comics continuity and the Saturday Morning ("SatAM") ABC show it ran concurrently with, Dr. Robotnik had already conquered a majority of the planet Mobius. His state and regime had no official name, though his seat of power was the captured royal city of Mobotropolis, which he renamed Robotropolis and converted into a factory city to produce his legions of robots.

Later in the Archie continuity (SatAM was cancelled early into Archie's run), both the original Dr. Robotnik and Robotropolis have been destroyed. He has been replaced by a Robotnik from an alternate dimension, designed to resemble his Sonic Adventure era design, and along with the games, now refers to himself as Dr. Eggman (though sometimes still calling himself Robotnik to avoid continuity confusion). Eggman has now established the Eggman Empire, which covers select regions of the Planet Mobius as he rules from the city of New Megaopolis. This Empire is currently engaged in open war with the Kingdom of Acorn.

Sonic the Comic
In the continuity of Fleetway's Sonic the Comic, Doctor Robotnik managed to conquer all of the planet Mobius and establish a totalitarian regime when Sonic and his crew were catapulted six months into the future by the Omni-Viewer. He remained in power from Sonic the Comic #8-#100, ruling the planet first from the Special Zone's Egg Fortress and later from Citadel Robotnik in the Metropolis City Zone. Under his rule, Mobius was heavily industrialised and (deliberately) polluted. Citizens could be grabbed at any moment to be sent to the Badnik Processing Plants and Robotnik would regularly send Badniks to attack the Zones he was in charge of, just to show he could. Due to his constant targeting of the Emerald Hill Zone, the people were secretly evacuated to the Mushroom Hill Zone on the Floating Island.

In the milestone 100th issue of STC, all of Robotnik's computer systems and Badniks are wiped out by an electromagnetic pulse generated by Super Sonic. He never managed to regain his power base, despite the aid of the extra-dimensional Drakon Empire and he was eventually driven insane by his failures and imprisoned at last. The Doctor Robotnik Appreciation Tribe sprung up immediately after his defeat, campaigning to bring Robotnik back.

Sonic the Hedgehog: The Movie
In the Japanese version of Sonic the Hedgehog: The Movie (also known as "Sonic Anime"), Dr. Eggman (Dr. Robotnik in the English Version) tells Sonic that he lived in the utopian city Eggmanland (Robotropolis in the English Version), but that a robot known as "Black Eggman" (Metal Robotnik in English) and his army destroyed his people and drove him into the dimension of Sonic and Tails, The Land of the Sky. Robotnikland itself appeared as a very modern city, complete with a giant light fixture in Robotnik's likeness. The entire city is powered by the Egg Generatorr(Robot Generator in English), a machine bearing Robotnik's face, deep within the Doctor's base. Unlike the games, where Robotnik wants to expand his empire, this version of the Doc seems content with ruling Robotnikland, and would rather simply destroy the Land of the Sky to make his empire the only ruling power in existence.