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Regardless of whatever medium you look at, the Sonic franchise is infested with horrible monsters.

Video Game CanonEdit

Archie ComicEdit

  • Dr Finitevus was once a fellow scientist of a race of prosperous echidnas, until a freak accident changed his looks and intelligence. Despite his new-found genius, he was declared mentally unstable and was to be put down. He escaped and later sold out his home to Dr. Robotnik. Everyone who had once lived there died later.
    • Furthermore, this guy manipulated four whole sides in a war (Dingoes, Echidnas, and two Dark Legion factions) into providing the fuel for the fire of his master plan, which is basically him deciding the world is hopelessly corrupt and he wants to purify fire. He, to this end, manipulated Dimitri, a head in a jar, into providing secrets and information, and then manipulated Knux into becoming Knuxerjak and starting a battle with his former friends after the whole corruption from power thing. Finitevus' expression at the scene where Knux becomes Enerjak shows he is not only mad, but completely delighted, even as his betrayed allies watch on and denounce him.
  • Dr. Robotnik, also from the Archie Sonic series, delights in causing suffering, is fiercely obsessed with power, and is willing to deprive creatures of their free will to make them work in his factories. Don't mistake his occasional brief team-ups with the heroes for redemption; he just cooperates with them when he thinks it will be to his own benefit. And his humor doesn't excuse his atrocities either.
    • To elaborate as to why Robotnik belongs on this list, here are a few examples of his activities. During the Great War, he intended to test weapons he'd developed for the government on his own people and fled to the Mobians side when he was to be punished for his actions. While acting as Warlord for King Acorn, he secretly captured a peaceful village of mobian monkeys and utilized them in an early attempt to create mechanical slaves by surgically implanting cybernetics, and of that entire village only one survived the process. Afterwards, he sabotaged the roboticizer developed by Charles Hedgehog just as it was to be used on his wounded brother Jules, making him think he'd turned his own brother into a mindless drone. When Jules' wife discovered the truth, Robotnik had Jules toss her into the Roboticizer and transformed into a robian as well, orphaning Sonic and crushing Charles' spirit to the point of retiring from being a Science Minister to running a chilidog stand. He then did similarly to Tails' father Amadeus on the day of his birth, making it seem as though Amadeus could care less for his newborn son and subsequently shattering his wife's heart, throughout which Robotnik maintained a straight face. Afterwards followed his betrayal of King Acorn and the takeover of mobius, during which countless families were broken and millions enslaved, and over the course of a decade, he'd wreak havoc upon planet Mobius, destroying the ecology and even pushing more than a few mobian breeds to the brink of extinction. And just prior to his death, he displayed a deeply disturbing relish at the thought of murdering one of his own kind and was positively gleeful when he got the chance to use his latest and greatest weapon on a fellow overlander.
    • And then there is his successor, Eggman, who hailed from a Mobius where he eventually conquered and destroyed everything and then decided to head to Mobius Prime to replace his deceased doppleganger and re-live the thrill of conquering Mobius out of boredom, and is still pretty much the reigning king of evil on Mobius. Though he's gone through several bouts of Villain Decay, when he comes back, he comes back BIG! His evil is, if anything, even more affable than his predecessor, which, if anything, makes him even more of a Complete Monster. One of the most unnerving of his many, many atrocious acts, is the creation of the Egg Grapes. Like his old plans of powering robots with animals, but on a bigger scale. These things sucked the life force from Mobians--sucked them completely dry, in fact--to power his city. He basically reeradicated the Echidna race with these things alone. Ten seconds in the process was enough to render Charmy Bee a semi-coherent loon. One of his (now deceased) minions actually asked Eggman if there wasn't some more efficient energy source he could use. He agreed there probably was, but "Where was the fun in that?" Really quite chilling. Before that, he pretended to be a savior to a displaced group of his race--including his own brother--when he was letting them get fatally poisoned by radiation with the intent of robotosizing them later. He was especially gleeful about doing this to his aforementioned brother. And all the stuff written about his predecessor above? He did almost all of that, too, in his home dimension.
  • Dark Enerjak is also from the Archie Sonic series and is the tyrannical ruler of another dimension. He is actually a version of Knuckles the Echidna whose Chaos Powers went out of control, also fueled by a desire to make the world a better place. While he started out noble, he gradually went more and more insane as time went on, before he considered everyone an enemy. Among his atrocities are: the sinking of an entire continent, likely causing countless deaths; the destruction of several enemy cities, such as Station Square, as punishment for their defiance; and the capture of his strongest opponents and ripping their soul out - victims including Sonic, Shadow, Tails, Amy, Sally, and just about all the villains, including the previously-mentioned Eggman and Finitevus.
    • As if to re-affirm his evil, you get a full shot of many of his more prominent victims after he demonstrates the process on his newest captive. He turns the souls into robotic slaves known as "Prelates" with his power. His soulmate was one of his victims, and he made sure not to use her soul to form a Prelate until the final battle...he summoned her to fight their daughter, much to said daughter's disbelief. He also announced how it would be "unfortunate" to suck his daughter's soul out too, showing he's beyond gone.
    • Upon getting his power taken away, he pretends to be sane again, hoping his daughter will give it back. Fortunately, she's wise to his complete monster status and promptly shatters the very sword that makes it possible to transfer such great power between individuals.
      • Ironically, despite his and Fin's clashing in the Prime timeline, they both seem to think they are heroes, rather than raving, destruction-hungry lunatics.
        • That said, he admits he does what he does for amusement, despite saying how much of a hero he is at other times. He allowed the Freedom Fighters (the ones that didn't have their souls ripped out from them, anyway) to exist to give him something to do, sent soldiers to other dimensions to try and find new worlds to conquer, continued to indulge Silver because of his power to actually give the living God a challenge (one of his questions to Silver was if the latter's universe had more "fun" beings like Silver, naturally to the hedgehog's anger). He derives joy from people's suffering, as seen with how he forces his own daughter to fight her mother and his former mate and how, upon seeing how upset Silver is at Enerjak using the souls to make his Prelate Army...he summons them all at once.
  • Another one from the Archie Sonic series is General Kage Von Stryker, the leader of the Eggman-backed Dingo Regime. After ousting his father from power, Kage led his people in conquering Angel Island, imprisoning the Echidnas in what were clearly concentration camps, which led to countless deaths. The one good thing to come of Knuckles becoming Enerjak (not to be confused with Dark Enerjak above) was that he atomized this bastard and wiped his city off the map.

Fleetway ComicEdit

  • Robotnik from (British) Sonic the Comic has signs of being this, possibly being even WORSE than his Archie comics counterpart! He manages to take over all of Mobius (while Archie's version only took one city at first and was seen slowly expanding) over just a single year (because Sonic was trapped in another dimension), implicitly commiting atrocities similar to his Archie counterparts or even worse (at many points, you can see him eating meat, and as all animals on Mobius are humanlike...), and instead of teaming up with the heroes to help stop a greater threat and protect his rule, he decides to lure Chaos (who's also a Complete Monster here, see below) to them so that they can all finally die for thwarting his plans for so long, even though it also means his own death. Not to mention trying to destroy the entirety of Mobius simply because he was tired of losing to Sonic (though having his entire empire destroyed may have had something to do with it). And again, humor does not excuse any of his atrocities. He's not the only monster in the series, either...
  • Dr. Zachary stole and broke the Master Emerald from the Floating Island in order to get some form of revenge on the other Echidnas, leaving the (inhabited) island to fall out of the sky onto the mountains below "as a monument to his genius", and he was hoping it would land on somewhere inhabited, crushing everyone to death. He then desired to eviscerate the population of Mobius for his own amusement before his revenge would be enacted. Later, when he returned as a cyborg, he proceeded to lead several people to Robotnik so he could make an organic computer of them, killing the victims in the process, which Zachary happily watched over. In the Online canon, he slowly drained all life of the Special Zone.
  • Fleetway also has Megatox. A sociopathic sludge monster made entirely out of Mega Mack, Megatox delights in trying to drown poor Sonic in the toxic sludge that compromises his body, an incredibly slow and painful way to die. He also wants to pollute all of Mobius one day, killing almost all life on the planet. His excuse? Simply because he can! He's a truly horrendous mix of Mr. Sinister and Hedorah.
  • Chaos in Sonic the Comic. Unlike his SEGA counterpart, he's shown as an utterly merciless monster with no sympathetic past, having once been a nasty Drakon Prosecutor before becoming the monster he is today. In his current state, Chaos has a "fear aura" that allows him to avoid attack, and exploits it to psychologically torture Sonic and co. He then fatally punches Johnny Lightfoot. Johnny didn't sacrifice himself or anything; Chaos straight-up MURDERED the poor bunny. He also tries to devour Sonic, resulting in his mutation. Coming across the Chaos Emeralds, he drains them, uncaring that the Floating Island will fall without their power. Eventually, he becomes Perfect Chaos and announces a plan to remold the whole of planet Mobius in his lethal image and murder anyone who resists. Karma kicks him in the balls when Sonic de-mutates him and throws him into the sea. Even his fellow Drakons think he's a lost cause. In the online continuation, it's said he tortured poor sweet Tikal for 8000 years! She was tortured for so long and so painfully that the sole reason she's not bonkers is because of Laser-Guided Amnesia.
  • The Evil One from the Nameless Zone arc also fits the bill, as he mutated a hapless old man into a hideous monster named Trogg, made him try to mutate all his buddies in the council, and then tries to brutally murder Tails! Word of God even called him "The Devil himself."
  • Emperor Metallix is another good example. Starting as a mindless drone of Robotnik, he begins a crusade to eradicate all organic life from Mobius. Forcibly cloning the Omni-Viewer, he callously has double-agent Nack the Weasel ordered killed before going after those he betrayed. He then engages a crusade to roboticize the Miracle Planet -threatening to murder Grimer in front of Sonic if the former doesn't cooperate- rewriting history in the process so that Robotnik never comes to be so instead Emperor Metallix has wiped out most organic life, with the few survivors dwelling beneath the earth. Even Robotnik is afraid of his utter lack of mercy for organic life and willingness to obtain his sick goals.

Animated Series Edit

  • Sonic Sat AM: Dr. Ivo Robotnik, unlike the Affably Evil version of him you'd see in other Sonic cartoons, (or the games themselves) is much less pleasant. He is willing to deprive innocent creatures of their free will to get them to work for him, he is willing to turn formerly beautiful communities into severely polluted wastelands, and he doesn't show any remorse for any of this. He doesn't just turn people into his robotic slaves if they don't obey him, he even turns the ones who DO obey him into robotic slaves.
    • Note also that the implications of said robotic slavery are much more serious in SatAM than they are in other Sonic cartoons and in the games Adventures of Sonic the Hedgehog and Sonic X portray Robotnik's henchrobots as feeling either genuinely loyal to him or at least inclined to try to help, while the games leave it a bit more ambiguous, but seem to treat it lightly, and almost all of the Undergroud ones are nonsentient; in this version, at least some of Robotnik's henchrobots are quite aware of what's happening to them, and morally objecting to that which their robot bodies are forcing them to do. There are episodes in which some robots are carrying on secret conversations with their loved ones, from before roboticization, only to double over in apparent pain before proceeding to attack said loved ones because of the control Robotnik has over them through said robotic slavery.
      • For comparison purposes, the worst thing the Robotnik from Sonic Underground did was tricking Manic with a robot made like a baby hedgehog in the hopes that he'd get attached to it -- and reveal where Sanctuary, a place of refuge for children and infants was. So he could destroy it and roboticize the inhabitants. Despicable, to be sure, but just not on the level of the SatAM version.