#sth fics

1. Mirror Image by kaleidoscopic_lover

Takes place: All Sonic universes

Chapters: 33/33 (completed)

Synopsis: Sonic is constantly challenged by his “rival” Shadow and can’t seem to form a relationship that doesn’t involve using their fists, until they’re forced to work together to escape a classic Eggman trap and discover they have more in common with each other than they think. As they bond, their feelings deepen as they come to understand each other a little better, but at the same time, the plan Eggman cooked up is ruining their social lives as a pair of robots made to look identical to the hedgehogs are wreaking havoc in their name… and are programmed to be in love. Very angsty but also very passionate.

2. Beyond a Promise by but_why_not

Takes place: All sonic universes

Chapters: 10/10 (completed)

Synopsis: First few chapters are Shadow’s POV, as he and Sonic grow their relationship by hanging out more often. Slice of life rivalry at Sonic’s birthday party as they explore what they mean to each other and eventually live happily ever after. Very fluffy, not too much action

3. Shattered Realities by foggystarrs

Takes place: SONIC PRIME VERSE

Chapters: 17/17 (completed)

Synopsis: Sonic and Shadow travel the shatterverse and end up in a reality where they’re both dating. Classic enemies to lovers with forced proximity, angst to fluff happy ending. Bonus points for being completed & a great reread!

4. The Secrets in our Quills by Nebrasska

Takes place: SONIC 3 MOVIE

Chapters: 24/25 (updated 3/31/25)

Synopsis: After Shadow helped Sonic to stop the Eclipse Cannon from destroying Earth and disappears, Sonic can’t stop thinking about him, wondering if he survived and if he was alone. Then he discovers that not only is Shadow still alive, but he tracked Sonic down and has been watching his family since the event, living in Sonic’s old cave in the Green Hills woods. Sonic starts building a friendship with him in secret as tension builds with GUN post-moon destruction, and Sonic and Shadow are faced with the same GUN operatives that held Shadow captive all his life while also being separated from their family. Mostly fluffy but very story driven.

5. Coming Home by nottheweirdest

Takes place: All sonic universes

Chapters: 16/16 (completed)

Synopsis: Shadow hasn’t spoken to Sonic in years, not since confessing his feelings and getting rejected. Now Sonic is getting married in a few days, and Shadow got the invitation and decides to go with the encouragement from Rouge, who seems to think Sonic actually returns Shadow’s feelings and shouldn’t marry Amy. Angsty but ultimately has a happy ending

6. Wolfboy by Trenchcoatgecko

Takes place: Sonic Unleashed AU

Chapters: 25/25 (completed)

Synopsis: Shadow, the notorious and world-famous werewolf hunter, is in town for a hit based on a tip he got for a blue werewolf for a bounty. But as he conducts his investigation trying to track the wolf, he discovers that the townspeople don’t fear him at all— rather, they talk of him like they want to protect him. In the meantime, a friendly (and devilishly handsome) local named Sonic has been more than welcoming to Shadow, and as they strike up a friendship it becomes pretty clear that Sonic is the very wolf the town is trying so hard to protect, and Shadow wonders if their relationship was built on Sonic’s last desperate attempt to save his own life or something real, and Sonic will have to find out if he was right about Shadow, and he really does have a sweet heart. Fluff and also angst

7. Clean Slate by nottheweirdest

Takes place: Sonic IDW Comics

Chapters: 30/30 (completed)

Synopsis: Sonic lost his memory in a battle and he’s stuck with Shadow trying to get back to friends he can’t even remember. But something his body seems to remember is the way it feels about Shadow… which makes things complicated as they get heated during isolation. Fun forbidden love and unintentional cheating vibes, very flirty

8. Silly Hats and Party Favors by Nebrasska

Takes place: All Sonic universes

Synopsis: Shadow crashes his beloved motorcycle and Rouge strikes a cheeky deal with him to get it back— attend five parties with her so she can get closer to Knuckles. Since the deal is a little too sweet not to take, Shadow finds himself going along with it, but every party he manages to find himself in some unwanted alone time with his annoying rival, Sonic. Enemies to friends to lovers with amazingly accurate characterizations and some of the best writing style I’ve seen, definitely a personal favorite to reread

9. Dearly Detested by queerwolf79

Takes place: All Sonic universes

Chapters: 10/10 (completed)

Synopsis: Sonic and Shadow become fuck buddies after a GUN mission gets particularly hot and steamy and pretty quickly they become addicted to thrill of hiding their secret relationship while trying not to catch feelings. In the meantime, they’re also distracted by a sinister scheme cooking up by a certain villain and shit starts to get real. Super fun enemies to lovers with smut and a cool action-packed story

10. From the Shadows of the Deep by Nebrasska

Takes place: All Sonic universe/ AU

Chapters: 15/? (ongoing) (updated 7/10/25)

Synopsis: Sonic scored a summer job at the local aquarium where a new exhibit featuring the mysterious and huge Kraken has been drawing in crowds to see, but the only thing the Kraken has ever seemed to take any interest in, for some reason, is Sonic. Also, for reasons probably unrelated, Shadow is also missing and Rouge has recruited Sonic to help find him, but he may be closer than he thinks…

EDIT: some of the fic authors are on tumblr, check out their other stuff!

@nottheweirdest

@nebrasska-alasska

@foggystarrs

**red means mature

**these are listed in No particular order