Doctor Eggman's Robots

Dr. Eggman's robots have been hassling Sonic and friends since, the nefarious Doctor Ivo "Eggman" Robotnik: a scientist par excellence in many fields, but his greatest genius lies in robotics, and with him designing more and more deadly automata. Deployed everywhere from tropical paradises to industrial hellscapes, on orbital battleships and inside cyberspace, his robots are the fat man's key tools in his quest to take over the world!

"Look at all of those Eggman's robots!..."
 * —Yails the Fox.

Badniks

 * Main article: Badniks

Once used mostly to designate an enemy robot in the young past, the Badniks were often powered by an different animalstrapped inside as an "organic battery". Badnik robots often parodied nature by looking like metallic animals themselves; Motobug and Buzzbomber being archetypical examples.

In addition to the basic badniks, they are included included a wide variety larger and more powerful unique robots, including the "boss machines".

Metal Series

 * Main article: Metal Series

In order to step up his game, Eggman decided to build the best combat robots in the appearances and forms of his enemies, and the Doctor's most fearsome enforcer in the Metal Series, is Metal Sonic. The Metal Series were designed with the datas of his enemies to give them an equal advantage with a sole purpose of defeating their "organic counterparts". Unlike Badniks, the Metal Series are not powered by animals or any other organic battery.

E-Series

 * Main article: E-Series

As time have progressed onwards and the times of the ubiquitous Egg Pawns, Eggman's design preferences took a distinct swing towards humanoid, rather than animal-shaped, robots (Metal Series of course, are different), and decided to be done away with the need for an organic battery in every robot. These included the E-100 series of E-102 Gamma and its brothers.

Hybrid Tech
While undoubtedly the greatest roboticist in the world, Eggman is not above stealing innovations from others if he thinks it might augment his own designs. The Doctor reverse-engineered Gizoid mimicry software (developed by the ancient Nocturnus Clan) to produce the E-121 Phi line of robots. By some accounts, he got around to doing the same thing with Emerl's hardware, combining the materials based on the Gizoid's, in an unholy union with his own technology to create Emerl's counterpart: Gemerl.

Eggman also wages a campaign of corporate espionage against the Rimlight Corporation, stealing their Light Core technology and using it to power the Egg Gunners and other robots during the attacks on Soleanna.