A high-performance robot created by Dr. Eggman to counter Sonic. Built to resemble Sonic, his speed and power are equal to or greater than the original's. Name: Metal Sonic English Name: METAL SONIC Alias: Metal Sonic Height: 100cm Weight: 125.2kg Special Skills: Black Shield (Barrier), Overdrive (Super-acceleration attack) Features: Constantly undergoing upgrades His body color is primarily metallic blue. The area around his eye sensors is black, and the sensors themselves glow red like eyes. An engine is built into his torso, with an air intake on his chest. His limbs are slender, but his fingers have sharp, thorn-like claws. His feet feature a design with white lines on a red background. He generally cannot speak and communicates through mechanical sounds. While synchronized with Eggman's will, he possesses a sense of self and acts on his own volition in certain cases. He possesses flight capabilities, high analytical skills, and the ability to copy an opponent's techniques.

The final model of the E-series robots built by Dr. Eggman and the most powerful unit. He transforms his arm parts into various weapons to annihilate enemies with overwhelming firepower. Having been sealed away for a long time immediately after completion, he harbors a strong hatred for his creator, Dr. Eggman. Omega's goals are to destroy all of Dr. Eggman's mechs to prove he is the "strongest" and to take revenge on the doctor for imprisoning him. Name: E-123 Omega English Name: E-123 Ω OMEGA Alias: Omega Height: 150cm Weight: 1230.512kg Dislikes: Dr. Eggman Special Skills: Omega Machine Gun, Omega Fire, Omega Missile, Omega Launcher

Name: E-102 Gamma English Name: E-102 GAMMA Alias: Gamma Height: 215cm Weight: 825.256kg Features: Armed with a 15.5cm single-barrel guided rapid-fire cannon. One unit, one barrel. He judges terrain and automatically transforms into high-speed travel mode when moving above a certain speed on land, and into flight mode by deploying fans from his abdomen over water. Can be equipped with a Type-3 Laser Gun and high-output boosters as options. A combat robot built by Eggman, the second unit of the E-100 series. Eggman's mechs originally used small animals at their core to extract bio-energy; E-102 also had a small bird inside. Following an encounter with Amy, he began to question his current existence and eventually set out to save his fellow E-series robots. The reason the first unit is called "Beta" and the second "Gamma" is due to the existence of the prototype unit 0, "Alpha," which was the unit "ZERO" assigned to capture Amy during the same period. "PREPARATIONS COMPLETE!" "AYE-AYE, DR. EGGMAN." "WHERE IS THIS...? DATA COMPARISON... NO DATA FOUND... CURRENT LOCATION UNKNOWN... ...TROUBLESOME." "IT SEEMS I HAVE ENTERED THE WRONG ROOM..." "BUT, IS THIS TRULY FOR THE BEST...? IS WHAT I MUST DO TRULY THE RIGHT THING...?" "RUN... IT IS DANGEROUS HERE... HURRY! WE WILL SOON REACH THE MYSTIC RUINS BASE."

Name: Emerl (True name unknown) English Name: EMERL Alias: Emerl Height: 110cm Weight: 14kg Features: Skill Get (Can copy others' techniques) A mysterious robot with the ability to learn techniques he sees from opponents and copy them as his own. His true identity is the Gizoid, an ultimate combat weapon from 4,000 years ago discovered and awakened by Professor Gerald during Chaos Emerald experiments. The name Emerl is derived from the fact that he runs on Chaos Emeralds. He powers up with each Chaos Emerald he absorbs, and his thinking and linguistic abilities develop accordingly. Upon absorbing all seven Chaos Emeralds, he grows to a level where he can speak just like Sonic and the others. He only listens to the person who is his contractor. As he absorbs Emeralds, he becomes more obedient. The strongest in the Sonic series.

A mysterious robot that appears everywhere to teach you things you don't know or provide commentary for matches. With a brisk and energetic tone, he delivers useful information whether you are on land, at sea, or in the air. Aside from the fact that there are many of them and they are not Dr. Eggman's robots, they are mostly shrouded in mystery; it is completely unknown when, where, who, or how they were made. Name: Omochao English Name: OMOCHAO Alias: Omochao

An assistant and chore robot created by Dr. Eggman. He is part of a duo with the square Cubot. Orbot is highly intelligent, serious, and reliable. He follows his master Dr. Eggman's orders faithfully and performs his work diligently, though he occasionally angers the doctor with poisonous sarcasm. He plays the straight man to Cubot's antics. Name: Orbot English Name: ORBOT Alias: Orbot Height: 87cm Weight: 30kg Special Skills: Data analysis, cleaning

An assistant and chore robot created by Dr. Eggman. He is part of a duo with the round Orbot. Cubot is a good-natured, easygoing fellow. Despite supposedly having the same CPU as Orbot, his processing speed is inexplicably slow. While he looks up to Dr. Eggman, he is a slacker who won't take action until he's yelled at, and is constantly being scolded. He plays the funny man to Orbot's straight man. Name: Cubot English Name: CUBOT Alias: Cubot Height: 90cm Weight: 39kg Features: His speaking style and personality change by swapping his internal voice chips.