"Obviously, you won't resist. So, let's see... How many rings you have left, TO STOP THIS!"
"Now here's what I'm gonna do. I won't kill you now. I'm going to make you suffer unimaginable pain until I get bored and decide to finish you off. You can cry and beg all you want, it won't convince me to stop. I'm going to make you wish you don't exist in this world. Oh, and don't worry about your family. I'll make sure they'll get the chance to see you again... in the afterlife."
— Clyde the Jackal, Memories of Infinite's Past
Similarly to the franchise itself, fan works based on Sonic the Hedgehog can have some shockingly vile villains.
All spoilers are unmarked. You Have Been Warned!
Franchise-wide
- Ghosts of the Future: The Sorceress of the Black Isle is the Arc Villain of the Arabian Nights arc. A character from the Arabian Nights who was previously thought to have died, the Sorceress uses the Chaos Emerald sent to the Arabian Nights to amplify her powers, commanding malevolent djinn to terrorize the land. When confronted by two djinn, Uhu and Fouh, the Sorceress imprisons Fouh, and tells Uhu that if he brings the Seven World Rings to her, she'll release Fouh. When the heroes arrive in her palace, the Sorceress congratulates Uhu for bringing Sonic, who has the Seven World Rings inside his body, to her before she reveals that she's brainwashed Fouh into being her slave, ordering her to kill Uhu. To get the Seven World Rings out of Sonic's body, the Sorceress uses her magic to hasten the Flames of Judgment on Sonic's chest, gleefully burning Sonic's body into nothing but bones. She then attempts to use the combined power of the Chaos Emerald and the Seven World Rings to destroy the Arabian Nights.
- Nazo Unleashed: Nazo was formed from the negative energy of the Chaos Emeralds, and desired to steal the Emeralds for himself for the purpose of gaining more power. After stealing a Chaos Emerald from a city, Nazo decided to destroy the city and kill all of its inhabitants for his own amusement. When he defeats Knuckles, Sonic, and Shadow, Nazo later brutally kills Tails for interrupting his attempt to kill Sonic. After he uses the Chaos Emeralds to transform into Perfect Nazo, he reveals that, because the Master Emerald will always have more power than him, he'll destroy the Earth and cause the Master Emerald's shattered pieces to spread throughout space, all out of envy. He also states that when he defeats the heroes, he'll go on to destroy the entire universe.
- Planet Chaos (link
): Infinite retains all his canon crimes and adds on to them. In the past, during his time working with Eggman, Infinite was responsible for attacking Planet Wisp, during which he murdered Nova's entire family. Infinite, who had survived his defeat, attacked and captured a large number of wisps. Infinite then drained the Wisps of their Hyper-Go-On Energy, weakening and threatening to kill them. Infinite later tries to use the wisps against Sonic and his friends, and when they rebel, Infinite tries to murder them all. Infinite is doing this to absorb as much power as possible to warp reality to destroy the entire universe and rule over whatever is left. When Nova confronts Infinite about killing his family, Infinite doesn't even remember it. - Prey (Sensation Studios):
- Starved is Doctor Ivo "Eggman" Robotnik after having consumed a cooked piggy. After becoming obsessed with the taste, he started building robots to hunt down the animals to cook and eat them, hunting down every animal on Little Planet, destroying any robots that don't meet his expectations, and even having his second Furnace kill Tails and Amy.
- The second Furnace that Starved built kills Tails and Amy the minute he is activated. After that, he attempts to catch Sonic to please Starved, but after getting a vision of Starved killing him for failing, he proceeds to just kill Starved, take over his robot army, and then bring Little Planet out of orbit to suffocate all its inhabitants, all in an effort to increase his own power.
- Sonic (Eddie Lebron): Dr. Robotnik, formerly known as Julian Kintobor, declares war on Mobius under the belief that society should be under his leadership, beginning his path of destruction by committing genocide on almost all of the South Islanders. Taking over Station Square, he has his forces overwhelm the G.U.N. Soldiers trying to stop him, and even attempts to have one of them murdered in cold blood. When Sonic stops this, he then proceeds to brutally torture a captured soldier for information on the Blue Blur, and when the soldier fails to provide him with the info, Robotnik orders the man to be robotized against his will. When an group of soldiers try to fight back, Robotnik orders his forces to ambush and mercilessly kill them. After Sonic saves the soldiers, Robotnik immediately orders his forces to kill Sonic for daring to interfere with his plans for conquest. Claiming that he's a well-intentioned man who's acting in the people's best interests, Dr. Robotnik is in reality a cruel, ruthless Mad Scientist who would kill anyone who would dare to get in his way.
- Sonic.exe:
- X is a monster resembling Sonic the Hedgehog. Trapped in another dimension, X created a cursed Sonic game. Once someone had played through the game, a portal would open up, allowing X to tear the players soul out of their body and take them back to his world for eternal torture. When Tom plays the game, he witnesses X torment several people whose souls have been transformed into Sonic characters, before he brings Tom into his realm. In Sonic.exe Round 2, it is revealed that X has killed 31 people, and plans to one day permanently cross over to Earth and turn it into a realm of eternal suffering. Viewing all of humanity as toys for his amusement, X is as evil as a Creepypasta monster could be.
- Shannon Goldman is the leader of the Cult of X. Viewing all of humanity as "stupid" and the Earth as "filthy", she formed the cult to help X with his evil plans. Shannon and her cult deliver the game to unsuspecting people, allowing X to claim more victims. After X has killed the victim, Shannon sends a member of her cult to retrieve the game and move on to the next victim. When a member of the cult named Cole realizes how evil they are and tries to stop them, they make him X's next victim. When detective Derek Green comes close to stopping them and destroying the game, Shannon and her cult tie him up, insert the game, and allow X to kill him. Shannon later sends Derek's friend Bob Richardson an audio file of Derek's death, likely as a way of taunting him about his friend's fate.
- Untitled series by JudasFm: In the past, Raker the Jackal had killed his father and drove his mother to suicide before abusing his brother, whom he would later name Bait. Raker would lead a gang responsible for numerous crimes, such as blowing up houses and selling Tails into slavery. During Caves of the Ancients, Sonic, Knuckles, and Bait head to the Scrap Brain Zone to save Tails, so Raker goes after them and ends up blowing up Oil Ocean Zone, killing thousands of people in the process. In the next fic, Sins of the Mothers, he teams up with Knuckles's thought-to-be-dead mother and Dr. Robotnik, in hopes of getting Bait back, just so that he can torture and kill him.
- There's Something About: Baron Robotnik is Sonic's mortal enemy who wishes to destroy Sonic's village and all his friends. Seeking the power of the Chaos Emerald, Robotnik embraced the power of the Emerald and turned himself into the monstrous Titan, in which attacks the village for years, causing massive casualties. Manipulating Sonic's goodwill, Robotnik tricks Sonic into transferring the Emerald's powers into him, ending in his own death but spitefully having Sonic continue his mission, as the crystals transform Sonic into the monstrous Titan, trapping Sonic inside with no way out as he is forced to attack the city and his friends.
Specific works
- Sonic the Comic Fan Webcomic Sonic the Comic – Online!: In this fanwork that has received Approval of God, these two prove to be especially evil:
- Dr. Zachary once again proves himself among the comic's nastiest. Zachary begins his new streak of evil by attempting to enslave Super Sonic to utilize his powers to wreak havoc across Mobius. Quickly cheated of that, Zachary builds up an alliance of like-minded psychopaths he calls The Syndicate and quickly builds a new plot to destroy Mobius utilizing the Chaos Emeralds. Snatching some of Sonic's DNA by capturing his young companion Tails and nearly drowning him, Zachary awakens the dormant Shadow the Hedgehog and uses his powers to draw the Chaos Emeralds out of the Special Zone, consequentially creating a massive chain reaction of Chaos Energy that obliterates the Special Zone and the billions of lives within. Brushing off the death of the Special Zone as a mere side effect of his plans, Zachary attempts to use a device he calls the Chaos Siphon to agitate the Chaos Energy on Mobius to the point where it causes an explosion potent enough to destroy the planet. Eventually foiled and captured by Knuckles, Zachary contents himself with sadistically mocking Knuckles about his failure to protect the Special Zone, and upon breaking out, forces Knuckles into a Sadistic Choice to either allow his friend Tikal to die or let the Floating Island collapse. A total sociopath as always who is utterly remorseless over the billions of lives lost to his machinations, Zachary proves he's no less of a monster here than he was in the original comic.
- Vichama note starts as an enigmatic flunky of Zachary enlisted in The Syndicate before revealing himself as something far worse. Vichama is in actuality the sadistic God of Death, an immortal entity who gained access to the physical plane through a deal with Pochacamac, using his new presence on Mobius to indiscriminately slaughter millions of echidnas. Trapping the souls of all of his murdered victims within his dark temple before he was banished, Vichama is brought back by Zachary and at first eagerly helps the doctor in his plot to destroy Mobius, helping to obliterate the Special Zone by proxy. Once Zachary's plot is foiled, Vichama leaves the doctor to die before rising his temple again and causing mass death through Mobius, assuming his true form as the God of Death. Casually incinerating Knuckles when he's confronted on his plot, Vichama announces his intent to bring the "gift of death" to everything that lives within the universe through all the enslaved souls in his thrall. Cloaking his murderous nature with a posh demeanor, Vichama is motivated by nothing less than a desire to spread mass death for its own sake and proves to be an utter bastard of a god who more than lives up to his title as the God of Death.
- SatAM fan game Sonic Epoch (link) takes place in a Bad Future:
- Dr. Julian Robotnik, beneath his politeness and despite his tragic past, is every bit as vile as before. When Sonic and Sally attack one of his bases, Robotnik attempts to disintegrate Sally by using his prototype teleporter against her. After Sonic saves Sally at the cost of disappearing in the teleporter, Robotnik installs several teleporters in the Green Forest where he can send his robots, overwhelming Knothole and the Freedom Fighters. Roboticizing Bunnie, Rotor, Antoine and several other Mobians, Robotnik gleefully break Tails and Sally's spirits by talking before sparing them so that they could live knowing that they lost their home and everyone they knew and loved. Ten years later, upon learning that Sonic reappeared and that Snively failed to stop him, Robotnik roboticized him. When facing Sonic for one last fight, Robotnik, having roboticized himself, reveals that he plans to send a gas to freeze the atmosphere and thus, the entire planet, killing every non-roboticized Mobian so that he could control the world forever. When defeated by Sonic, he spitefully self-destructs to take Sonic with him. A genocidal racist, Robotnik manages to darken the already darker setting of Sonic Epoch whenever he appears.
- Game Boy Advance version only: Snively is Robotnik's nephew, second-in-command, and is a far cry from the joke he used to be in the original show. Ten years after Sonic mysteriously disappeared and Robotnik took over the world, Snively stumbles upon Sally tending to Sonic. Desperate to kill Sonic before Robotnik finds out, Snively attempts to kill the duo several times, sending his robot '53 to destroy Sally's home in an attempt to kill them both. When '53 comes back with only a teenage Tails, Snively threatens to disintegrate him. When Sonic and Sally ends up in Kumquat Village, Snively sent the Daemon Bug to kidnap and brainwash Sally, fully aware that Sally will still be conscious when the Bug will brainwash her. When Patrick Facade fails to keep Sonic inside the village as Snively told him, Snively sent '53 to destroy Kumquat Village in one last desperate attempt to kill Sonic and Sally.
- Shadow the Hedgehog Fan Webcomic Flashback (link): Black Doom returns from his previous defeat with a vengeance. Black Doom seeks to finish what he started by once more becoming his true form, Devil Doom, and wiping out all of humankind. Black Doom sics the Black Arms onto Sonic's world, having them once more ravage the planet in search for the Chaos Emeralds, terrorizing presumably countless innocents in the process. Upon regaining a physical form, Black Doom proceeds to infiltrate the Space Colony ARK where he kidnaps and holds Maria hostage for the purposes of blackmailing Shadow into doing his bidding. Mocking Gerald Robotnik for how his mistakes were going to cause the downfall of humanity, Black Doom proves himself to be just as nasty as he is in canon.
- Sonic '06 rewrite What If Sonic 06 Had a GOOD Story?: Mephiles the Dark is a piece of the fractured time god Solaris, looking to reunite with his other half Iblis in order to reign destruction upon time and space. Orchestrating an elaborate scheme that involves Playing Both Sides, Mephiles sends the naïve Silver the Hedgehog on a hunt for the Chaos Emeralds, stating that he needed to terminate anyone who got in his way, while also feeding Dr. Eggman information about the Flames of Disaster that would lead to him summoning Blaze along with Solena into Sonic's world. Capturing and brainwashing Metal Sonic after his latest defeat, Mephiles has him abduct Amy to use as leverage in order to obtain the Chaos Emeralds from the opposing party. Upon their attempts to rebel and Blaze trying to attack him, Mephiles, now with all the pieces of the puzzle put into place, impales Blaze in the chest, causing Iblis, who had been trapped inside of her for many years, to be released. Now with the released Iblis along with the Chaos Emeralds, Mephiles once more fuses with his other half, becoming Solaris in order to reign hell upon the multiverse.
- Forces fanfics Memories of Infinite's Past & Sonic Forces Chapter 2: Former terrorist and thrill killer Clyde the Jackal escapes from prison to become a ruthless crime boss. Killing his Arch-Enemy Stryker, Clyde takes the "Phantom Ruby" from the classic version of Eggman, before torturing both the past and present versions of Eggman for more information on the item. Mastering the Ruby's power, Clyde murders his own loyal henchmen before attacking Grand Metropolis, turning the world into Hell on Earth when Sonic and his companions fail to stop him. Psychologically and physically tormenting a jackal who tries to stop him, Clyde has several innocent wisps and their mother captured and transformed into brainwashed creatures to empower his own weapons. After he seemingly defeats Sonic, Clyde brainwashes the resistance group into maiming each other while leaving the survivors to be executed and, after truly being beaten, he tries to destroy the universe out of spite.
