Sonic in Undertale - ZairaDrayan - Wattpad

Sonic in Undertale

Reads 2,295
Votes 78
Parts 17
Time 3h 28m

Reads 2,295
Votes 78
Parts 17
Time 3h 28m

adventure betrayal chara crossover determination fanfiction fate genocide humor lily notmyoc pacifist papyrus sans sega shadow shadowthehedgehog skeleton sonic sonicthehedgehog timeline tobyfox toriel undertale unfinished

Sonic and Shadow fall into a hole and pass through the barrier that Shadow had made to seal away the monsters of the Underground. It is then that they meet everyone in Undertale after the pacifist events. It's just that after being exposed to the chaos emeralds has made them forget about when the human saved them all and are repeating what they did in the original game all over again! Can Sonic and Shadow make it back to the surface alive or at all?

Front picture created by: LilyEsmeraldFox!!!! @LilyEsmeraldFoxAll Rights Reserved

adventure betrayal chara crossover determination fanfiction fate genocide humor lily notmyoc pacifist papyrus sans sega shadow shadowthehedgehog skeleton sonic sonicthehedgehog timeline tobyfox toriel undertale unfinished

Table of contents

17 parts

Sign up to add Sonic in Undertale to your library and receive updates

or

Content Guidelines

You may also like

[HIATUS] Don't Forget [Sans x Female Reader] by GabrielXander

You would think that with how shit your luck is, you would've been dead day one since falling into the Underground filled with scary monsters and a few spooky skeletons. However, much to your surprise, that did not happen (yet). You know how you ended up here, but you don't know... HOW. You're actually in the GAME Undertale now. And to make matters worse, there are some people who KNOW. You're surviving the best you can, but things are only going to get weirder from here on out. Gaster apparently needs your help? You're using the DJ to go to different AU's? You are gay now?- Okay, maybe that last one is just a joke, but still! You can only hope that your instincts are enough to keep you alive in these trenches. On God, they tryin' to drown you in this hoe! {Available on Patreon, Quotev, and Ao3 under GabrielXander}

My Sonadow College AU (Request) by GhostZero1420

Sonic the Hedgehog thought college life at Evergreen University would be all about track meets, late-night pizza runs, and breezing through classes with his usual carefree charm. But everything changes when a chance encounter in the library leads him to Shadow the Hedgehog-a mysterious and aloof student with a reputation for keeping people at arm's length. At first, their meeting is anything but smooth: a spilled coffee, a sarcastic remark, and an intense stare that Sonic can't quite shake off. Despite their differences, fate-or perhaps sheer stubbornness-keeps pulling them into each other's orbit. From late-night study sessions to unexpected team-ups during campus events, Sonic begins to see the vulnerable side of Shadow hiding beneath his tough exterior, while Shadow finds himself drawn to Sonic's infectious energy and relentless optimism. {This was a requested story from my Discord gang!}

━━━━ 𝕱𝖑𝖚𝖋𝖋𝖞 𝕮𝖑𝖔𝖚𝖉𝖘 | 𝔖𝔬𝔫𝔦𝔠𝔛 by -ElectraHearts

【 𝗗𝗜𝗦𝗖𝗢𝗡𝗧𝗜𝗡𝗨𝗘𝗗 】 ┃𝗦𝗢 𝗧𝗛𝗜𝗦 𝗜𝗦 𝗟𝗢𝗩𝗘? 𝗦𝗢 𝗧𝗛𝗜𝗦 𝗜𝗦 𝗪𝗛𝗔𝗧 𝗠𝗔𝗞𝗘𝗦 𝗟𝗜𝗙𝗘 𝗗𝗜𝗩𝗜𝗡𝗘?.. ss. 𝐅𝐋𝐔𝐅𝐅𝐘 𝐂𝐋𝐎𝐔𝐃𝐒 . ❨ 🪷☁️ . ❩ ❁ཻུ۪۪ ━ 𝐈𝐍 𝐖𝐇𝐈𝐂𝐇 Y/N the sheep was often seen as 'peculiar' amongst others, having a lot going on in their mind behind their aloof expression. But one night when they were out to save their friends from the grasp of Dr Eggman, an unexpected turn of events occurred and a phenomenal case of Chaos Control sent them all to a planet called Earth. 𑁍ࠜೄ ━ How will Y/N along with Sonic and their friends settle with Earth? ━ Will they ever get back to their home? ━ Will Eggman show up again and cause havoc like usual? ━ Will they end up catching hearts along the way? ━ Who knows what they would do! "You're so soft and warm!♡" "Am I a pillow to you now?" ☁︎┆𝗦𝗢𝗡𝗜𝗖𝗫 𝘅 𝗢𝗖!𝗥𝗘𝗔𝗗𝗘𝗥. ☁︎┆𝗠𝗢𝗦𝗧 𝗢𝗙 𝗧𝗛𝗘 𝗔𝗥𝗧 𝗜𝗦 𝗗𝗥𝗔𝗪𝗡 𝗕𝗬 𝗠𝗘. © ꜱᴇɢᴀ © ꜱᴏɴɪᴄ ᴛʜᴇ ʜᴇᴅɢᴇʜᴏɢ © ꜱᴏɴɪᴄ x © ᴛᴍꜱ ᴇɴᴛᴇʀᴛᴀɪɴᴍᴇɴᴛ © ᴛᴠ ᴛᴏᴋʏᴏ © -ᴇʟᴇᴄᴛʀᴀʜᴇᴀʀᴛꜱ

The price of immortality (Sonadow) by Dragoneslocos

Shadow subconsciously begins to develop deeper feelings for the blue hedgehog as time passes. But how much time does one have to admit to another how they really feel? Might it just be too late? What happens when words go unsaid and life takes them in a different direction? Will Shadow be able to fix what is irreparable? Join me on a truly profound, soul-stirring, heart-wrenching, thrilling, illuminating adventure where Death is the greatest enemy and it is up to the pure choice of the heart to exist happily ever after?🫶🏾🥹🤞🏾

ᴛᴡᴏ ꜱᴛᴀʀꜱ ᴅᴇꜱᴛɪɴᴇᴅ ꜰᴏʀ ᴡᴏʀꜱᴇ || ꜱʜᴀᴅɪʟᴠᴇʀ ꜱᴛᴏʀʏ by Vxxii__

Shadow and Silver, two stars who were destined for each other; but will they make it out alive? In the busy city of Fumine they both had no other choice but to run into each other. Stuck in a mystery with none other than Black Doom and Mephiles. They both have to work together along with their friends and colleagues together to defeat the unknown. Do you wanna join their journey? All characters belong to SEGA

The Loss of Gold (Sonadow) - Completed by betheyes

Summary: In the midst of the battle, Sonic calls upon Silver and Shadow to help him defeat their enemy. The seven chaos emeralds are there and react to two of them but one hedgehog finds themselves in quite the predicament. He doesn't glow, instead he is driven to his knees in agony facing demons like no other before. A darkness is coming to all the zones and our heroes are left questioning the past, present and future. Allies like no other come from afar as our heroes are forced through painful paths to save their home. Warnings: Violence, Torture, Use of Swearing, Use of weapons - guns Blood, Gore, Male Pregnancy, Medical Experiments, Death, Miscarriage, Alien Language (Bold), Carnivore Female x Female, Male x Male, Female x Male --> DON'T LIKE, DON'T READ! = SIMPLE! ALL CHARACTERS BELONG TO THEIR RIGHTFUL OWNERS - SEGA - HAVE BEEN USED PURPOSELY FOR FANFIC (Maybe a couple original characters - but not many) Black Arms Language will be in BOLD Started: 03/05/2023 Finished: 09/10/2023

Shadows of a Broken Future by Shadz_Hedgehog

In a world shattered by Eggman's destruction, Shadow the Hedgehog, the Ultimate Lifeform, walks alone through the wreckage of a once-thriving world. The last remnants of his team and friends, Omega, a lone robotic companion, can no longer withstand the harsh aftermath. But just when it seems all hope is lost, Shadow is unexpectedly transported back in time-one year before the fall-into a world brimming with life, friendship, and familiar faces. With everything to lose and the haunting fear of isolation looming, Shadow is determined to change the inevitable future. This second chance isn't just about saving the world-it's about mending broken bonds and confronting the deepest fears he's ever known. As he grows closer to his friends, particularly Sonic, their rivalry begins to shift into something deeper, more dangerous, and more meaningful than either could have imagined. Can Shadow truly change his fate, or will the weight of the past and the fear of loneliness tear everything apart? In a world on the brink of destruction, Shadow's most important battle may just be the one inside his own heart. ✮WARNINGS✮ ⋆Slight swearing. ⋆Mature themes (violence/fighting). ⋆Smut. ‧₊✮Cover picture credit: @Hyeon_sonic

ShadAmy: Return To Darkness by TayReBaby

After sixteen years, Mephiles has returned. Darker and more power hungry...after failing to defeat and kill Shadow, Sonic and the rest of the gang, he Is going to make sure he gets what he wants this time, by using the power of the chaos emeralds,He infects Shadow with a rabies like disease, called Muskiomal which makes Shadow a ruthless cannabalsitic killer at nightfall. Not only does Mephiles turn Shadow into a killer hedgehog, he forces him to take out revenge on not only on on Mobians but the entire universe as well. But only Amy Rose is aware of Shadow's illness after witnessing Shadow consuming human and Mobian remains behind a restaurant dumpster. Amy vows to keep Shadow's condition a secret not only for the safety of Sonic and the gang but for the universe...but if G.U.N finds out the ultimate life form and their top agent as dangerous... it could result in him being held captive, being detained against his will and experimented on as long as possible. Despite the life threatening situation, Shadow and Amy's connection grows closer and closer which ultimately leads to them having an affair which eventually leads them to being together, much to the disdain of not only Sonic, but to the entire group, unfortunately, it later becomes a weakness which will give Mephiles a possible one up against the team Will Amy and the rest of the crew find a cure for Shadow's condition or will he forever be Mephiles' murderous puppet? (All characters and images used belong to SEGA and their rightful owners.)

You and I (Shadaze) by Akshee4

"What are we?" "I don't know." "Neither do i." "You are playing with fire." ------------------------------------ Things turned upside down at Broken Arrow High when Shadow the Hedgehog, or named as Shadow Hunter, returns back. His arch nemesis, Blaze the Cat, named as Blaze Miller, is extremely flustered by his arrival. Despite the fact they absolutely can't stand each other, they reside in the same locality, as neighbours. Sometimes they're on the verge to kill each other and other times they can't keep their hands off each other. Will they realise their true feelings beyond the sea of hatred and competition? Or will they let the sparks between them die due to their ego? Things aren't going to be easy though as their deepest and darkest secrets and pasts will unleash in front of one another. ------------------------------------ Disclaimer: I do not own any (most) characters. They belong to Sega. All pictures are from Pinterest and/or Google. If the owner wants me to remove any pictures, I will do so. And all song lyrics(if any) are from their respective singer. Warning: This story contains strong language, use of substances, self-harm, childhood trauma, mild to (slightly)intense flirting, detailed description of certain scenes and alcohol consumption. Enjoy!!

Sonic 3 Story! by AnnaliseHamato14

after the events of Sonic 1 and 2, Annalise, Erwina and their friends finally have time to catch their breath and relax. however, there is a new foe out in the world, a hedgehog named Shadow who is out for 2 things- revenge and who he assumes is an old friend. will the heroes be able to stop Shadow with the help of.... EGGMAN?! find out in this story! apologies for any spoilers. Eriwna Chee belongs to herself I own nothing but my OC

You may also like

Slide 1 of 10

[HIATUS] Don't Forget [Sans x Female Reader] cover

My Sonadow College AU (Request) cover

��━━━━ 𝕱𝖑𝖚𝖋𝖋𝖞 𝕮𝖑𝖔𝖚𝖉𝖘 | 𝔖𝔬𝔫𝔦𝔠𝔛 cover

The price of immortality (Sonadow) cover

ᴛᴡᴏ ꜱᴛᴀʀꜱ ᴅᴇꜱᴛɪɴᴇᴅ ꜰᴏʀ ᴡᴏʀꜱᴇ || ꜱʜᴀᴅɪʟᴠᴇʀ ꜱᴛᴏʀʏ cover

The Loss of Gold (Sonadow) - Completed cover

Shadows of a Broken Future cover

ShadAmy: Return To Darkness cover

You and I (Shadaze) cover

Sonic 3 Story! cover

[HIATUS] Don't Forget [Sans x Female Reader]

You would think that with how shit your luck is, you would've been dead day one since falling into the Underground filled with scary monsters and a few spooky skeletons. However, much to your surprise, that did not happen (yet). You know how you ended up here, but you don't know... HOW. You're actually in the GAME Undertale now. And to make matters worse, there are some people who KNOW. You're surviving the best you can, but things are only going to get weirder from here on out. Gaster apparently needs your help? You're using the DJ to go to different AU's? You are gay now?- Okay, maybe that last one is just a joke, but still! You can only hope that your instincts are enough to keep you alive in these trenches. On God, they tryin' to drown you in this hoe! {Available on Patreon, Quotev, and Ao3 under GabrielXander}