Metal Sonic


 * Metal Sonic redirects here. For the first Metal Sonic in the original reality, see Shard the Metal Sonic. For other Sonic robots, see Metal Sonic (disambiguation).

Current= Metal Sonic is a Badnik created by Dr. Eggman to do battle with Sonic the Hedgehog, having been created to match and surpass his abilities. Metal Sonic is obsessed with this goal, to the point that he briefly betrayed his creator and took on a powerful new form known as Neo Metal Sonic all for the sake of crushing his hated rival. Metal Sonic is the name applied to a powerful badnik based on Sonic the Hedgehog that was created by Dr. Eggman to serve as the ultimate match for the speedy hedgehog. This badnik has usually been loyal to Dr. Eggman to an extent and has proven to be an effective adversary against Sonic the Hedgehog on occasion. Numerous versions of Metal Sonic have been produced by Eggman, as successive units are destroyed in battle against Sonic and other enemies. Nevertheless, each successive model became more dangerous to confront, and its threat potential only increased after being joined by other similar Badniks as part of the Metal Series.
 * -|Pre-Super Genesis Wave=

History
Current= =Past= Metal was created at some point after Dr. Eggman began his campaign for world domination. The robot was first used during Eggmans plot to find the Time Stones on the Little Planet. During this time, Metal kidnapped a young Amy Rose, holding her hostage in the Stardust Speedway Zone. After traversing the miniature planet, Sonic tracked Metal down and raced the doppelganger, resulting in Metal being heavily damaged in the chase, allowing Sonic to rescue Amy. When the Little Planet returned, Dr. Eggman recovered and repaired Metal Sonic, who absorbed a powerful energy source before confronting Sonic and Tails yet again. However, despite the improvements, Metal Sonic was once again defeated. (VG: SCD, StH4)

This incarnation of Metal later reappeared in the White Space created by the Time Eater, where it once again challenged Sonic to race along the Stardust Speedway. As before, Metal proved no match for the hedgehog, who went on to defeat the Time Eater. On another occasion, Metal Sonic was deployed again, not against Sonic but against his rival Knuckles the Echidna, the Chaotix, and their ally Mighty the Armadillo. Once again he was defeated by the heroes of Mobius, though his defeat was preceded by the arrival of-or perhaps his transformation into-Titan Metal Sonic. (VG: SG, KC)

Much later, Metal Sonic returned, with a completely self-upgraded AI, complete with an independent personality. The robot devised a plan to copy the lifeform data of Sonic and his friends, a task he accomplished by kidnapping his former master Eggman and using metallic copies of him to fool the heroes. During this time, he confronted Breezie the Hedgehog, building Casino Park for her as part of her new financial empire under his Eggman disguise. Breezie recognized Metal as an imposter due to his actions, as Eggman wouldn't be so generous. When Metal threatened to harm her should she warn Sonic, she brushed it off and the two apparently shared something of a relationship. Metal's plan was later discovered, but by then it was ready to use the gathered data to transform into Metal Overlord. Super Sonic, along with a super-charged Tails and Knuckles, were able to defeat the robot, returning him to his original powered down form. Metal Sonic, disguised as another Eggman robot, later ended up briefly joining Team Dark to take part in an Extreme Gear race, though his identity was eventually revealed. (StH: #270, VG: SH, SFR)

=The Hunter=
 * From a readers perspective, this picks up from where the original pre-Super Genesis Wave continuity left off

Several days after Eggman, Orbot and Cubot ended up crash landed in the Efrikan plains after the effects of the Super Genesis wave, the trio returned to the Death Egg after a lengthy misadventure across Mobius, where they discovered that Sally had been aboard the Death Egg on a mission and subsequently escaped, Eggman had Metal Sonic sent after her, hoping to have her killed before Sonic could arrive to save her. Metal Sonic chased Sally to Mobotropolis, where he struck down her escape craft, but allowed her to gain help in the form of Amy Rose and Cream. Despite the girls' strength, Metal Sonic easily overpowered them and a Royal Palace Guard troupe before Sonic entered the fray. Chasing Metal Sonic out of Mobotropolis, he proved to be nothing more than a distraction as Tails locked onto Metal Sonic with a missile and shot at him, destroying the lower half of his body. Still functioning, Metal Sonic vowed revenge and flew off. (StH: #255, #256)

After being repaired, Metal Sonic was sent to learn more about the Gaia Temples, and located a possible informant in the form of Gregorios in Apotos. Before he could question the old man, however, Metal was contacted by Eggman and ordered to proceed to Casino Park. (StH: #268)

=The Original Metal Sonic (v1.0, v2.0, and v2.5)=
 * -|Pre-Super Genesis Wave=
 * ''See also: Shard the Metal Sonic - First Encounter (v1.0), Fighting the Chaotix (v2.0), and Vengeance & Sacrifice (v2.5)

The first variant of Metal Sonic was built by Dr. Ivo Robotnik so he could have his "own Sonic the Hedgehog". In his first plan involving Metal Sonic, it overheated its engine while trying to catch up to Sonic the Hedgehog, melting the lower half of its body. This Metal Sonic was later rebuilt with a Power Gem core to stop Knuckles the Echidna and the Chaotix. After a prolonged battle involving Metal Sonic transforming into Titan Metal Sonic v2.0 the robotic duplicate was defeated seemingly once and for all. Though destroyed by Knuckles, Metal Sonic survived due to its Power Gem core. Driven by revenge, the new and improved Metal Sonic kidnapped Miles "Tails" Prower and held him hostage at Mount Mobius, but it ultimately sacrificed itself to save Sonic and Tails when Tails' heroic actions allowed it to see it could be more than its programming. It was thought to have finally met its demise, but its core programming was later found to be part of the still functional Power Gem and the robot was rebuilt into the heroic Shard the Metal Sonic. (StH: #25, #86, #87, KCX, SU: #43)

=Versus Sonic and Shadow (v3.0)= When the Freedom Fighters and Shadow the Hedgehog found a lost military base from before the Xorda attack, Dr. Eggman constructed Metal Sonic and sent him to investigate, as well as engage Sonic in combat. (StH: #146)

Sonic, Metal Sonic and Shadow all got into a three-way brawl upon meeting up, with the latter two eventually teaming up against the blue blur. When the three were separated, however, Metal Sonic found himself conversing with the base's caretaker, Isaac, about the history of the instillation and Mobius itself. (StH: #147, #148)

When the three started fighting again, they stumbled upon an ancient missile that Isaac was about to launch. The missile was stopped by Shadow and Sonic, and the new Metal Sonic was defeated and destroyed. (StH: #148, #149)

=Settling Scores (v3.1)= Following this encounter, Shadow located the facility on Prison Island where Professor Gerald Robotnik had finished creating him and was last seen alive. There, a replacement model of the destroyed Metal Sonic suprised and engaged Shadow in combat. The two were rendered unconscious when Metal Sonic fired a super charged weapon that caused a major explosion nearby. Eggman's "daughter" Mecha retrieved the damaged Metal Sonic and brought him back for repairs, while also bringing Shadow with her. (StH: #157)

Some time later, Metal Sonic soon captured Sonic and brought him to Dr. Eggman, who used a device to control Sonic's body. When Metal Sonic went into some sort of stasis, Snively, frustrated with Eggman's childlike methods of defeating Sonic, decided it would be a good time to betray his uncle once again. When he attempted to reprogram Metal Sonic to work for him however, he found that it was spying on him. Eggman revealed that he knew of Snively's treacherous ways, and programmed Metal Sonic, along with every other robot, to monitor Snively in case he decided to back stab him once again. When Knuckles destroyed the device in Sonic's ear, Eggman and Metal Sonic attacked Knothole Village, but Metal Sonic was easily destroyed by Sonic, Tails, and Knuckles. (FCS: #1)

=Two for One (v3.2)= A new model was produced and used to attack Freedom HQ. Unlike previous models, this Metal Sonic allowed Dr. Eggman to speak through it via radio transmission. When Scourge the Hedgehog explained to Eggman that he and the Suppression Squad had taken over Freedom HQ, Eggman simply had the new Metal Sonic attack him. Sonic arrived on the scene shortly afterwards, but Scourge decided he preferred to fight alone and not get help from Sonic, despite having little success against the robot. Metal Sonic then proceeded to attack both Scourge and Sonic, and reinforcements arrived moments later in the form of Metal Scourge. (StH: #191)

While holding the upper hand against their organic counterparts, both Metal Sonic and Metal Scourge were quickly destroyed by the Suppression Squad. Their parts were salvaged, however, and used by Sir Charles Hedgehog to reconstruct Shard. (StH: #192, #238)

=Cross-dimensional Clash (v3.3)=
 * See also: Captain Metal

Shortly after the destruction of both Metal Sonic and Metal Scourge by the Suppression Squad, Eggman created a new Metal Sonic model, this time using the newer SXSU-401 engine instead of the typical STH-25, allowing the robot to transport to any other dimension to pursue Sonic. Metal Sonic then left for Moebius against his creator's will to find and attack Sonic and the others in Castle Acorn. Sonic later made an offer for Metal Sonic to help him take out Scourge first, instead of attacking everyone else, and the robot nonchalantly agreed. Scourge didn't give up, however, and rushed to the throne room, followed by Sonic and Shadow. Scourge then turned the tables on everyone by revealing that he had placed Anarchy Beryl in his throne. This allowed Scourge to transform into a stronger form; Super Scourge. (StH: #195)

Metal Sonic was temporarily defeated by Super Scourge along with the others and then tried to attack Sonic again when he deduced that defeating Scourge was no longer an option. It was later transported to another location along with Shadow when he tried to override Metal's teleporter engine with Chaos Control. Arriving in an alternate universe, Metal Sonic was employed by that reality's version of Dr. Robotnik to attack everyone, but was once again transported to a different reality by Shadow. (StH: #196, SX: #40)

Metal Sonic and Shadow then ended up in the Sol Zone, floating above an ocean. Shadow tried to convince Metal Sonic to no longer obey Dr. Eggman, but Metal Sonic completely ignored Shadow's request and kicked him into the water before flying off to look for the zone's version of Eggman. Furious that he could not locate that zone's Robotnik, Metal Sonic began attacking Southern Island. Shadow, Blaze and Marine showed up shortly to witness the destruction Metal Sonic had caused. Blaze furiously attacked Metal Sonic, but the machine simply used his powers to reverse Blaze's attack. Neither Shadow or Marine could take down Metal Sonic. However, Shadow tried once again to convince Metal Sonic to work with him, but Metal Sonic simply pointed out they each had different goals, and his was to serve Dr. Eggman. Thus, Blaze set fire to Metal Sonic, and Shadow charged at him. The robot flew towards the Ocean Tornado, and Marine destroyed him with the ship's cannon. (SU: #1)

After his destruction, Metal Sonic was salvaged and rebuilt using pirate tech by an unknown individual. Now calling himself "Captain Metal" with a new look, he began searching for the Sol Emeralds for his grand designs. (SU: #55)

=Rise of the Death Egg II (v3.4)= The next Metal Sonic model appeared during Sonic and Sally's attempt to thwart Dr. Eggman's Operation: Clean Sweep aboard the Death Egg Mark 2. Soon after Eggman revealed his new world Roboticizer and a simulation of it's devastating effects on Mobius, Sonic moved to attack the doctor when a new Metal Sonic swooped down from behind and charged him. Ranting on the latest model, Sonic battled his robotic counterpart as it worked in tandem with a damaged Silver Sonic v3.0 from an earlier fight. (StH: #230)

As the fight went on, it seemed Metal Sonic and his giant silver brethren would be victorious. A light then flashed from the Roboticizer as it activated, however the device exploded due to a malfunction and destroyed the room, heavily damaging the Death Egg. Already being a robot, Metal Sonic was incompatible to the Roboticization process just like other mechanics, and it blew up into a robotic mess with its head severed. (StH: #230)

=Causing a Casualty (v3.5)= This unit was built after Operation: Clean Sweep and appeared alongside the upgraded Mecha Sally when Dr. Eggman attempted to assassinate Elias Acorn and his family while relocating from New Mobotropolis to Feral Forest, and at first focused on Sonic as it's primary target while proving to be too much for the deroboticized Bunnie. As the robots battled with the convoy's escort, Dr. Eggman ordered Metal Sonic to latch onto the Mobo-Cruiser carrying the Acorn family and detonate. Antoine removed Metal Sonic from the vehicle in time, however, and was the only one caught in the robot's explosion, which left him comatose. (StH: #234, #235)

=Team Metal (v3.6)= Dr. Eggman unveiled the seventh incarnation of Metal Sonic v3.0 to his Dark Egg Legion Grandmasters along with the rest of the Metal Series for the purpose of serving as the doctor's new enforcers as a result of Snively's betrayal. It accompanied Mecha Sally in joining the Eggman Empire's attack on Central City in an effort to find Snively. During the battle, Metal Sonic and Mecha Sally were able to take E-123 Omega by surprise and attacked him using their laser cannons. As Snively attempted to escape again, Mecha Sally and Metal Sonic effortlessly destroyed the G.U.N. fighters sent out to bring down Snively's craft before returning to the Egg 'Stache Flyer to continue the chase. It was then dispatched along with Metal Tails and Metal Amy as Team Metal in New Mobotropolis with assistance from Tails Doll in an attempt to get rid of Team Freedom, but as it was about to engage Heavy and Bomb, Metal Sonic was attacked by Shard, the original Metal Sonic, who then proceeded to destroy it. (SU: #37, #38, StH: #240)

=Revenge on Shard (v3.7)= Dr. Eggman deployed the eighth incarnation of Metal Sonic to destroy Shard, who had defeated his predecessor. Equipped with Eggman's last Power Gem, memories of all the defeats of his predecessors, and greater free will, it was initially opposed to the idea of going after Shard as opposed to Sonic. However, having learned from his previous attempts, Eggman had installed a soft-reboot defiance kill-switch, which quickly halted any inclinations of disobedience. Pleased with the device's success, Eggman lamented that he had been unable to fit Shard, Gamma, or Omega with such devices as well, not to mention the impossibility of using one on Snively. Metal Sonic soon arrived in New Mobotropolis, arriving so quickly and disrupting NICOLE's systems by some means that left her unable to prevent its entry. It proceeded to Tommy Turtle Memorial Hospital, where it located Antoine and was about to finish what v3.5 had started when Shard arrived to confront it. Fortunately, Shard was able to goad Metal Sonic into fighting elsewhere and leaving the helpless Antoine where it had found him. The pair flew to the Great Wastes, which Metal Sonic chose as their battle site because it was "proof of robotic superiority" given the success of Mecha Sonic against the Freedom Fighters there in the past. Shard pointed out the irony that despite the apparent "inferiority" of organic lifeforms, some robots strove to become more like them, and pointed out Metal Sonic's own increased personality. (SU: #50)

Metal Sonic claimed that it had been improved upon to the point of perfection, and to which Shard demurred, citing his own efforts to help the people of the Republic of Acorn gain a more positive impression of robots. Metal Sonic expressed its utter lack of care for Shard's attempts or his own actions, and the pair quickly engaged each other in battle. The battle was intense, each unit deploying their individual methods of attack and defense, but Metal Sonic soon gained the upper hand. Using memories of its predecessors' battles with various Mobians, it jammed Shard's laser cannon arm with a rock, deflected his Spin-Dash before responding with its own, and vaporized the rock when Shard launched it from his cannon. Held in Metal Sonic's grip, Shard attempted to reason with it, telling him that he could become more than just a weapon, reminding Metal Sonic of Shadow's efforts to convince v3.3 of the same thing. However, the kill switch activated again, and Metal Sonic prepared to terminate Shard before moving on to New Mobotropolis. Determined to stop it, Shard retaliated with his adaptive arm, using its cannon feature again before turning it into a drill in an attempt to finish Metal Sonic off. Metal Sonic severed the limb with its shield, but Shard was determined to destroy it even when warned of the danger to himself. He went after the Power Gem core, and Metal Sonic realized the vulnerability of the feature and caused it to explode, consuming itself and badly damaging Shard. (SU: #50)

=Worlds Collide (v3.8)= Dr. Eggman created the ninth incarnation from the remains of the eighth incarnation after its battle with Shard. Retaining the previous version's memories, he reported Shard's apparent destruction and the loss of his Power Gem core. He then prepared to go after New Mobotropolis, but was informed that Tails Doll would handle that; he was also informed that, despite his desire to do so, he would not be sent after Sonic. Eggman deployed Metal Sonic to the Interdimensional Gateway to meet his new partner, whom he claimed Metal Sonic would like due to his status as a "base villain" like the robot itself. Metal Sonic accepted the assignment, and was informed by Eggman that it was his "undying, heartless weapon of misery and despair." Deciding that this was acceptable, it prepared to leave as Eggman, Orbot, Cubot and Mecha Sally looked on. (SU: #50).

Shortly thereafter, the second Genesis Wave was unleashed on Mobius, creating an altered timeline where Metal Sonic had been defeated by Sonic multiple times, including after transforming into a dragon-like form. Metal Sonic was paired with Bass, the newest assistant of Eggman's new partner, Dr. Wily, and sent to kidnap Tails. The two henchmen swiftly overwhelmed the two-tailed fox and took his unconscious body back to the Doctors. Following this, Metal Sonic went to Mega City to attack Mega Man. He struck the blue bomber from behind and then fled through a warp ring to Mobius, where the real Sonic was chasing Megaman's double, Copybot, in Green Hill Zone. Following instructions from the Doctors, the two evil doubles lured their counterparts to each other's location as part of a ploy to trick the two blue heroes into fighting each other, which was successful. His objective complete, Metal Sonic sped off to await further orders. (MM: #24, SU: #51, #53).

When the battle between Sonic and Mega Man unexpectedly moved to Mega City in Mega Man's world, Wily guessed that it was the work of Dr. Light, Mega Man's creator. Worried that Light would be a threat to their plans, the two doctors sent Metal Sonic and Bass to deal with him. The pair subsequently kidnapped Dr. Light despite interference from Proto Man, and took him back to the Wily Egg in the Skull Egg Zone. When Rouge the Bat began sabotaging the flying fortress, Metal Sonic and Bass pursued her and cornered her in one of the laboratories, and managed to capture her despite her release of the Chaos Devil. The pair then took her to be Roboticized into Rouge Woman, who joined the army of Robot Masters sent against Sonic and Mega Man's team of allies. During the battle, Eggman had Metal Sonic accompany him to Dr. Light's cell, and had Metal Sonic drag the doctor to a large hatch on the fortress. Having determined that Light was too great a threat to keep around, Eggman had Metal Sonic throw him off the ship. (STH: #248, #250, SU : #53, MM: #25)

Metal Sonic, Bass, and Treble were then deployed to intercept Mega Man and Sonic, who had boarded the Wily Egg, and engaged the pair in battle. The villainous robots proved a formidable challenge to the heroes, and Metal Sonic proved just as dangerous an opponent to Mega Man as to Sonic. Employing several of his new weapons, Metal Sonic attempted to destroy Mega Man even after Bass was taken out of the fight, but proved no match for Sonic and Mega Man's combined power, especially with Mega Man's Roboticized Master weapons. The damaged trio eventually managed to pick themselves up, only to encounter a fleeing Knuckles, Proto Man, and Dr. Light and be caught up in the effects of the Super Genesis Wave. Due to Super Sonic's efforts, this wave's effects-as well as those of the preceding one-were undone on Mobius, but Eggman's interference had a dangerous impact on Mobius. (MM: #27, SU: #54, StH: #251)

Appearance
Metal Sonic was created in the image of Sonic the Hedgehog, and is thus mostly built of blue metal. He has a yellow circular depression in his chest with a black center, mirroring the peach-colored fur on Sonic's chest. His head has metal fins resembling Sonic's quills, and a pair of triangular "ears." Metal Sonic has a muzzle, shoulder plates, and upper arms, legs, and fingers made out of silvery metal. His palms are black, while the backs of his hands are square yellow plates. His forearms and lower legs are blue metal like his head and torso, and he has red feet with white stripes designed to resemble Sonic's shoes. He has optic sensors with black sclera and red irises.

As Neo Metal Sonic, Metal Sonic developed larger fins with white streaks running up them, with one running down between his eyes and onto his forehead. His shoulder armor became black, and he developed a black band around his waist decorated with silver spikes. This band also produced a black cape that fell around Metal Sonic's legs. He also grew taller, with many of his features becoming more angular. He could also transform to take on the exact appearance of Dr. Eggman.

Personality
Current= Metal Sonic's single desire is to surpass and defeat Sonic the Hedgehog, and at one point went to incredible lengths to destroy its "loathsome copy" by betraying Eggman and transforming into the monstrous Metal Overlord. After its betrayal, it appears that Eggman placed some form of safeguard on it to ensure that Metal Sonic remains obedient to him. Despite this safeguard, Metal Sonic still retains its single minded desire to surpass Sonic. In terms of personality, Metal Sonic has displayed little to nothing in the vast majority of its incarnations. Single-minded and unquestioning loyalty to Eggman was its function, as per its creator's design; having experienced previous failures with free will programming, Eggman didn't want to chance his prized creation turning against him. Despite attempts by Shadow to reason with one model, all versions of Metal Sonic v3.0 have remained devoutly loyal to Eggman. However, it is notable that the same model was also persuaded to join Sonic, Shadow, Amy Rose, Robert O'Hedge, and Silver the Hedgehog against Scourge. This may be more due to Scourge being a slightly more greater yet easier to defeat target, though once Scourge went super, Metal Sonic deemed it a futile mission and went back to his original objectives.
 * -|Pre-SGW=

Metal Sonic is often viewed as cold and merciless, even mindless, and the majority of models have been silent during battle. For some, speech was not even an option: the fifth, sixth, and seventh models were voiceless, and the third model merely served as a radio mouthpiece for Eggman. The eighth model was equipped with a voice and more developed personality programming, which expressed cold outrage at the losses of previous models and and a single-minded desire to destroy Sonic. It also briefly expressed rebellious tendencies at the idea of being ordered to attack another enemy, but Eggman's safeguards quickly rendered it docile.

Abilities
Current= Having been created to destroy Sonic, Metal Sonic is possessed of incredible speed and strength, as well as flight capability. He is also capable of manifesting energy in the form of his defensive Black Shield or offensive Burst Shield. Metal Sonic has also demonstrated the ability to exceed his original design and take on incredible powers, such as when he became a more powerful version of himself called Neo Metal Sonic. In this form he could morph his form into silvery metal and take on the appearance of others, most notably Dr. Eggman, and later transformed into Metal Overlord. It is possible that he also transformed into Titan Metal Sonic. Being a robotic clone of Sonic, Metal Sonic has access to many of Sonic's powers and abilities thanks to his equipment. Including the rocket pack in his back, that allows him to run at speeds possibly surpassing those of even Sonic himself. Metal's speed and power vary from the different models, the third one proving too much for Sonic or Scourge. In addition to Sonic's abilities, Metal has numerous other capabilities. He can fly by utilizing the rocket pack on his back along with impressive strength and moderately strong armor.
 * -|Pre-Super Genesis Wave=

Over time, the newer line of Metals began to get extra features and upgrades. The third Metal Sonic created by Dr. Eggman, had some sort of energy cannon that it fired from out of the front air intake of its engine housing where his stomach would be. The fourth Metal Sonic had the same cannon design which it used on Shadow and was also able to teleport due to the SXSU-401 engine. The sixth and eighth Metal Sonics were equipped with a self-destruct mechanism, and it is likely that the other models also possess this ability. The seventh version of Metal Sonic can do a combo attack with Mecha Sally using a laser installed in its back.

After the seventh models battle with Shard, Eggman determined that his decision to leave out a free will algorithm in Metal Sonic, to prevent rebellion, made it weaker then the original. To correct his mistake he installed his last Power Gem into the eighth model of Metal Sonic, containing the free will algorithm and all the battle data of the previous models battles, so it could think during a battle and learn from its mistakes. He also installed a soft-reboot defiance kill-switch to prevent it from rebelling against him like his predecessor. Unfortunately, the Power Gem was destroyed in Metal Sonic's subsequent battle with Shard, but the ninth model, rebuilt from the parts of the eighth, retained its free will and memories even without the Power Gem.

The eighth and ninth models also exhibited increased combat capabilities, including a variety of energy shields. One of these was a spherical defense mode, known as the Burst Shield. Another was first exhibited after the second Genesis Wave, and was a diamond shaped barrier known as the Black Shield. Metal Sonic also displayed the V. Maximum Overdrive attack, which created a field of energy around him that allowed him to drive Mega Man through several barriers before dissipating.

Background Information

 * Interestingly, another Metal Sonic was seen being built in the background when Espio was sneaking through Eggman's lab. It can be assumed that this is the Metal Sonic later used to attack Scourge at Freedom HQ. (StH: #174, #191)
 * It's possible that the inclusion of Eggman being able to talk through the third model via voice communication is a reference to Metal Sonic's appearence in the PSP game Sonic Rivals 2, because Eggman actually used Metal Sonic to talk to Shadow in the game.
 * The fourth Metal Sonic spoke in a manner similar to that of HK-47, where he states what type of thing he's going to say before he says it. For example: he says "Explanation: Super form ensures 0% success rate." in StH: #196.
 * The fifth Metal Sonic is strikingly similar to the second model as both were seen in action for only a short time and physical details.
 * Metal Sonic's first engine is named the STH-25, after the first Sonic the Hedgehog issue he appeared in.
 * Metal Sonic's newest engine, the SXSU-401, is named after the first issue he appeared in a Sonic X comic and Sonic Universe respectively.
 * SX__-40_ = Sonic X #40
 * __SU-__1 = Sonic Universe #1


 * This Metal Sonic's designation as v3.0 was confirmed by writer Ian Flynn of the Archie Sonic the Hedgehog comic blog.
 * v3.6 is the only model that did not face Sonic and the only version to be part of the Metal Series. v3.3 and v3.7 onward are the only models capable of speaking.
 * Before the introduction of v3.7, Ian Flynn purposefully made Metal Sonic v3.0 a machine without personality, being of the opinion that it makes him "more creepy" and that it would be redundant to portray him as obsessed with beating Sonic as his game counterpart is, given that several characters-notably Shadow-already exist with that agenda in the comic.
 * The large number of Metal Sonic v3.0 versions--some of them in rapid succession--is a sore spot with some fans, who feel that the character isn't as impressive as he should be in terms of ability.
 * v3.8 currently holds the distinction of having the most on-panel appearances of any Metal Sonic v3.0 model to date, having appeared in twelve issues thus far, plus a brief mention at the end of Sonic #255. Sega edict has mandated that v3.7 and beyond be the same Metal Sonic, thus he might be showing up a lot more.
 * As SEGA's mandate claims that there should only be one Metal Sonic in the new universe, it is possible that now all previous versions of Metal Sonic ever built have been merged into a single continuously rebuilt entity. However, Captain Metal (a previous Metal Sonic model) still continues to exist with his nature as a Metal Sonic now only being hinted upon, indicating that previous separate models may still exist or have existed in some form.
 * In the video games Metal Sonic has little to no speaking role and the only games that give him speech are in Sonic Heroes and Sonic Generations, Sonic Heroes being the only one where he is actually given a voice.