Sonicunderground Stories

Sonic's past is a twisted one that he's been running from. He's been running from it for who knows long? His friends know nothing about the blue hedgehog's past. Not eve...

It was raining the night the strangers arrived. Acting as though they knew more about Sonic then they did, telling storys of their childhood, and all thier old friends. ...

After being missing for about 4 years Sonia, Manic, and Queen Aleena have finally located their missing family member. Sonic the Hedgehog who disappeared after Robotnick...

Six years ago, Sonic left his home, his kingdom, and his family behind to stop Robotnik from taking over the world. Everyone knows that story. But what happens when his...

this is the second version of this taking place after the three fanfics (sonic characters react to him, super smash bros reacts to sonic, and sonic the last smash fighte...

Sonic never told Shadow, Tails, and his friends about his life about Sonic Underground, or the fact he was a prince, searching for his mother. When Dr. Rototnik threate...

Sonic Underground has completed its mission and the royal hedgehogs have reclaimed their kingdom... now what? Anarchy, that's what! Well, at least, that's what Sonic bel...

Science can explain anyone on Mobius... but not Sonic. Why is it that the one we think we ought to know the most about is the one we actually know the least? Set in the...

What would you do if you reject the one that confessed to his or her love to you? Would you give his or her a chance or forget til it's too late? If you had your eyes on...

Takes place after "When Two Become One"; Silver never realized how much Blaze meant to him until she began going with Sonic. When a sorceress offers him a chan...

y/n and her two best friends, m/b/f and f/b/f, are having another of their usual all night long anime binge-a-thons, when they are suddenly sucked into the floor by a my...

Shadow, Sonic, and his siblings help the Squid Sisters with their concert coming up as Sonic Underground fills in for the Chirpy Chips band, and head to Splatsville afte...

Meet Serena The Hedgehog who is Sonic, Manic and Sonia's cousin while being the brains of the group. After being partly roboticized she uses her new skills to fight Robo...

Something odd is happening to both Sonic and Blaze's worlds... They appear to be coming together. They must solve the mystery of the Chaos and Sol Emeralds before "...

Sonic one day told Amy his secret feelings for her and now they are dating and everything! But when Sonic got a letter saying that he must return to his home kingdom say...

From the very talented @TheGeekyGamerReborn I decided to put some left out characters and add my character to it.

Meet Princess Kadence the Hedgehog or "Kade" for short, the eldest sibling of her triplet siblings Sonic, Sonia, and Manic. When the evil Dr. Robotnik took ove...

This is how I would make a Sonic Underground Movie! There will probably be a lot of references to Sonic's past games. Plot: Eggman's Master Plan comes into motion to fre...

After the war, Robotnik escaped to try to take over another part of Mobius, but the triplets didn't follow him because they thought that they could take care of himself...

Our cobalt blue hedgehog hero with jade green eyes and brown scarf isn't Sonic. So, what really happened to Sonic? Who is Sonic the Hedgehog? And will Shadow love the im...