1 - 20 of 55 Works in Doom Morph Transformation (Sonic the Hedgehog)
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The Heck is That?!? by ultimatelifeform1955
Fandoms: Sonic the Hedgehog - All Media Types, Sonic the Hedgehog (Video Games)
09 Dec 2025
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Summary
The others find out about Shadow's doom powers, specifically doom morph. Their reactions vary wildly.
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El servidor by Tita03
Fandoms: Sonic the Hedgehog - All Media Types, Sonic the Hedgehog (Video Games), Sonic the Hedgehog (IDW Comics), Sonic Boom (Cartoon), Sonic Prime (Cartoon 2022), Sonic the Hedgehog (Live Action Universe), Dioses Mexicas - Fandom
07 Dec 2025
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Sonic tiene muchos secretos, algunos solo lo conocen sus amigos,y otros no los conoce nadien.
Pero cuando empieza a tener un presentimiento de algo terrible se da cuenta que todo sale a la luz tarde o temprano.
O:
Sonic boom se ambienta después de los videojuegos y de los cómics de IDWSeries
- Part 3 of Eras diferentes,mismas historias
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To the Waves, We Return by EmmaSmoke
Fandoms: Sonic the Hedgehog - All Media Types, Sonic the Hedgehog (IDW Comics), Sonic Prime (Cartoon 2022)
05 Dec 2025
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After the vagabond Sonic gets into legal trouble with Clean Sweep Co., he's hired to be a janitor (blackmailed into being a spy) for Spagonia University, specifically the wing that deals with the merfolk. Despite their violent nature, Sonic starts developing a bond with the sea creatures, particularly Nine, the one who looks like the brother Sonic lost. Even stranger than that, he's also forging relationships with the workers at the university and the people connected to them.
But the truth of who he is will come out eventually, and the fallout might be impossible to handle if he doesn't figure out Clutch wants in all of this.
Or, Sonic teaches merfolk how to belong while also learning this lesson and how to healthily deal with his own grief
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In the underground boss chamber, Shadow and Mephiles' duel has lasted for far too long. Nothing Shadow does can kill Mephiles. Unable to get the Doom Gear and leave, Shadow has to resort to... questionable means.
He strikes up a deal with Mephiles. They both get what they want, even if Shadow gets a bit carried away.
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Stars Align by initforthelolz
Fandoms: Sonic the Hedgehog - All Media Types, Sonic the Hedgehog (Live Action Universe), Sonic Boom (Cartoon), Sonic Prime (Cartoon 2022), Sonic the Hedgehog (IDW Comics)
27 Nov 2025
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After witnessing a terrible tragedy, Shadow is frozen in stone for five hundred years. When the spell finally ends, he has only one goal: revenge. But he'll need a bit of extra fire power to make his enemies pay. Unfortunately for him, a certain blue hedgehog is hell bent on making sure that this power doesn't fall into the wrong hands.
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Sonic and Shadow chase each other across the globe and beat each other up a whole lot along the way.
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Handle Me With Care by bluprismwrites
Fandoms: Sonic the Hedgehog (Live Action Universe), Sonic the Hedgehog - All Media Types
23 Nov 2025
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Shadow survived the fall after the Eclipse Cannon explosion, and is now alone in the middle of nowhere. Or, so he thinks - he quickly encounters a tiny purple mouse called Kaia, merely only 8cm tall, similar to himself and Sonic, who withstood some of the impact from his crash into the Earth. Racked with feelings of guilt, Shadow checks to see if the tiny mouse is fine, only to discover that she is incredibly chatty and insists on travelling with him for protection, much to his dismay.
Along the way, Shadow uncovers more about himself, with the help of his newfound tiny friend. Events/elements of the Shadow the Hedgehog game and Sonic X Shadow Generations will be loosely incorporated throughout the fic.
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In the simple little town ruled by Queen Elise, the small but strong group of Sonic, Amy, Knuckles and Tails are personally requested by the queen to go and do what hadn't been completed in centuries.
But as the group explore the secrets of the ocean while on their journey, they learn things that aren't supposed supposed to be uncovered.
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"It’d all started with that damn mission. Shadow knew better than to go digging around and fucking with the skeletons in your metaphorical closet. It knew this even moreso when it comes to Shadow’s past. So why did it go around doing such a thing?
The justified reason was to make sure G.U.N. didn’t have anything left of what was Shadow’s past. They didn’t deserve that after what they did.
So here Shadow was, now stumbling home to where it knew the darkness of the past couldn’t quite fully reach, no matter how deep the scars go."
Aka, Shadow had a Bad Time and seeks out a deeper form of comfort that a home itself cannot provide alone.
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Shadow finally finds his perfect mate. There are just a few adjustments he needs to make, first.
Series
- Part 2 of CJ's Top Shadow Week
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He wasn’t a guy who was so easily scared, much less of Shadow, but… Somehow, Sonic felt goosebumps trailing through his body, as if some instinctive part of him felt that something was wrong. His survival instincts screamed that he would have a better chance of staying safe on the raging storm outside than continuing inside, which was a ludicrous idea. Sonic knew Shadow wouldn’t hurt him (not much, at least), so why was he having such a dreadful feeling growing in the pit of his stomach?
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Shadow is missing, and Sonic is called into a mission to find and bring him back. Even with the lingering feeling that something is wrong, Sonic still agrees to help, but maybe he should've listened to his instincts this time.
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Whumptober 2025 by GhostyBabey
Fandoms: Sonic the Hedgehog - All Media Types, Sonic the Hedgehog (Video Games), Sonic the Hedgehog (Live Action Universe), Sonic Boom (Cartoon), Sonic Prime (Cartoon 2022)
31 Oct 2025
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A collection of Whumptober 2025 fics, Sonic the Hedgehog style. Many of them will be Sonic-focused and Sonadow-focused because I can't help myself. Tags will update as I add stories.
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Sonic Awakening by aloftinthebreeze
Fandoms: Sonic the Hedgehog - All Media Types, Sonic the Hedgehog (Video Games)
30 Oct 2025
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Four months after the War ended, Sonic finds himself waking up in Tails' bed without much memory of the prior night. He discovers that, thanks to Rouge, he and Shadow finally spent a night together, after circling one another for years. The pair can finally be honest with themselves and each other, admitting and commiting to the feelings they've harbored for so long. Just as soon as Sonic admits to Shadow that he remembers nothing of their first night together, that is.
Meanwhile, the Doctor is digging up ancient evils again. The team understands the stakes too late and Sonic is once again separated from them. Shadow and team must recover him once again while dealing with a menagerie of threats, chief of whom seems not to be ancient, but very much modern. Sage, Dr. Robotnik's fully autonomous generalized artificial intelligence agent, is rapidly gaining strength, influence, and complexity. Faced with a foe without a body to destroy, will the team be able to save the planet before it is too late?
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Plot Centric Adventure/Suspense Story with occasional heavy spice and occasional graphically violent action sequences.
Complex multi threaded narrative
Knuxouge SubplotCurrently in Arc 2 of 3.
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Ichorous by electrikitty_writes
Fandoms: Sonic the Hedgehog - All Media Types, Sonic the Hedgehog (Video Games)
27 Oct 2025
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The events of White Space didn’t merely leave Shadow with scars. They also gave GUN a new reason to be concerned about the Black Arms. But when a test for a new chemical weapon designed to fight the aliens goes catastrophically wrong, Shadow’s powers reawaken, forcing him and Rouge to watch a twisted, Lovecraftian nightmare unfold within the containment facility beneath GUN’s headquarters.
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Echoes of Chaos by ShaddySoup
Fandoms: Sonic the Hedgehog - All Media Types, Sonic the Hedgehog (Video Games)
20 Oct 2025
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Summary
(aka shadow and biolizard chill because theyre both failures, the AU)
THIS IS AN AU. IF YOU DONT LIKE AUS. WHAT ARE YOU DOING ON THIS WEBSITE. EXPECT CRAZY THINGS TO HAPPEN THAT ARE VERY OUT OF CANON. i mean just read the title
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The Biolizard couldn’t speak, not in a traditional way. It was still just a dumb lizard. However, it was somewhat sentient. Somewhat. To communicate, it could create a link with a fellow user of chaos energy and from there it would be able to share its extremely simplistic thoughts and feelings.Shadow was the only one around it could share its thoughts with. So it did.
Little Shadow- that's what the creature had named him. The hybrid wasn’t sure the reason behind it, whether it be his size compared to the lizard or whether it saw him as something of a younger sibling.
As if on cue, he heard an intrusion in his thoughts as the lizard formed a link.
“Little Shadow.”
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yeah, uhm. shadow is marked as a failure after an experiment goes crazy wrong and is forced to kind of chill with the biolizard until hes needed
sorry for lack of updates m goin through some sh -
A Morph Mishap by ultimatelifeform1955
Fandoms: Sonic the Hedgehog - All Media Types, Sonic the Hedgehog (Video Games)
20 Oct 2025
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Summary
Shadow loses control of his Doom Morph while sparring with Sonic
Series
- Part 3 of Random Sonic Oneshots
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The Ultimate Parasitic Lifeform: That Freak of Nature by AZWritesStuff
Fandoms: Sonic the Hedgehog - All Media Types
12 Oct 2025
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Sonic the Hedgehog's life was far from boring, that's for sure. Unfortunately, he was suffering through one of those slow days between grand adventures. Tails seemed to be interested in something though: this strange signal he received from some abandoned facility barely connected to the EggNet. It wasn't an emerald, no, but something else messing with the ambient energy inside.
Huh. Well, that doesn't just happen outta nowhere.
To kill their boredom, Sonic and Tails decided to go and investigate the signal, expecting to find an abandoned project of sorts within that old base.
Well...they weren't wrong about what it was, but they weren't expecting it to be an actual living being hiding in the building's ventilation shafts where it wasn't supposed to be at all.
Nor was Sonic expecting to become an unwilling host to something that genuinely made him feel uneasy.
...Would it bad idea to ask how things could possibly get worse from here?
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Shadow transforms into the Doom Morph after being surrounded. He's tired of Sonic's nagging to see this new form after the stupid Twitter event. He despises it, despises these powers; he knows he looks monstrous.
He expected Sonic to make fun of him, tease him, and be disgusted by him. But he doesn't get that. Neither of them expects to be in the damp, dark, cave, alone with the sound of their heartbeats.
Sonic is his. He will make Sonic belong to him.
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Monsters don't only come out in the dark. (3) by Anonymous
Fandoms: Sonic the Hedgehog - All Media Types
11 Oct 2025
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Sonic doesn't know what's worse, the fact he's been kidnapped by an alien, the fact it's his boyfriend, or the fact that he clearly looks distressed, irritated... in heat..?
Kinktober 2025, Day 3 Prompt: Alien Abduction
(Skip ts it's so ass I only wrote it so I could get this fuckass prompt outta the way i might even remove my tag atp... augh..)
Series
- Part 3 of Kinktober 2025 anon 💤
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"you want what?" by CasualButtercup
Fandoms: Sonic the Hedgehog - All Media Types, Sonic the Hedgehog (Video Games)
09 Oct 2025
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Summary
Sonic is curious about Shadow’s Doom Morph form.
Kinktober 2025 Day 9: Tentacles
Series
- Part 8 of Sonic Oneshots
- Part 1 of Sonadow
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Summary
Collection of stories following Hellbound's Top Shadow Week prompts