- Shadow – “So, there's more to you than just looking like me. What are you anyway?”
- Sonic – “What you see is what you get! Just a guy that loves adventure! I'm Sonic the Hedgehog!”
- — Sonic Adventure 2
In most canons, both Sonic and Shadow share an arch-rivalry, starting as enemies when they first met up.
When they first met as enemies in Sonic Adventure 2, Shadow believed Sonic to have been copying him, with a mutual belief from Sonic, but later they became bitter arch-rivals after Shadow's amnesia. Since meeting each other, there has been a never-ending competition between the two, and their battles can range from friendly races to fierce death battles. In any case, one always wants to outdo the other.
Now there's a mutual respect between them despite their ferocious arch-rivalry and frequent fights. Over time, Shadow has become more confident about Sonic doing what is right, and Sonic has become more accepted of Shadow's violent attitude as well.
Their relationship is similar to the games. However, there was once a moment when Sonic felt sadness for his arch-rival as Shadow had presumably perished after the destruction of Letter of Gabriel, but after the timeline was reset, Sonic immediately called and checked up on Shadow, and was elated to find him alive.
Their relationship is similar to the games, but at the first time they met, Shadow showed interest in meeting Sonic, noting their similarities and mocking Sonic as a weak opponent upon defeating Sonic in combat. However, he later changed this view about Sonic after seeing Sonic use Chaos Control. Shadow became impressed by Sonic and respected him as a rival ever since.
Like other canons, both are tense arch-rivals; however, unlike most other canons, the two never showed partnership even once. However, Shadow has a small degree of respect towards Sonic, and, in fact, fighting against him is one of the few things Shadow ever shows an interest in.
- Shadow rescues Sonic from being killed by Silver, lets him go and fights in his place.
- When Sonic is dead, Shadow refuses to look at Sonic's body and instead turns away and closes his eyes in sadness.
While Sonadow isn't the most popular ship for either of the characters, it's the most popular slash ship in the Sonic fandom and it still has a large fan-following. Currently, on AO3, there are 326 fics. Fanfiction.net, on the other hand, nearly has 300. The main reasons the two are shipped is their mutual understanding and rivalry.
- “Sayonara, Shadow the Hedgehog.”
- — Sonic, Sonic Adventure 2
- Sonic – “Now that was sweet, Shadow!”
- Shadow – “Yeah... Well I'm not here to save you!”
- Sonic – “Thought you might say something like that! How about a little friendly competition?”
- Shadow – “Don't waste my time.”
- — Shadow the Hedgehog
- “Shadow... Why...why are you siding with them?”
- — Sonic, Shadow the Hedgehog
- “Sonic... Here I come.”
- — Shadow, Sonic the Hedgehog (2006)
- Shadow – “Heh, looks like I don't need to be too worried.”
- Sonic – “What was that?”
- Tails – “Were you worried if we'd get hurt trying to rescue the Wisps?”
- Shadow – “Hmph!”
- Sonic – “I'll just take that as a compliment.”
- — Sonic Colors (Nintendo DS)
- Sonic/Shadow on FanFiction.Net
- Shadow/Sonic the Werehog on FanFiction.Net
- Shadow/Sonic on FanFiction.Net
- Shadow/Sonic tag on AO3
- sonadow tag on Deviant Art
- shadonic tag on Deviant Art
- sonshad tag on Deviant Art
- sonshadow tag on Deviant Art
- shadsonic tag on Deviant Art
- sonicxshadow tag on Deviant Art
- shadowxsonic tag on Deviant Art
- SonicXShadowClub fanclub on Deviant Art
- Love-Sonadow-fanclub fanclub on Deviant Art
- super-fans-sonadow fanclub on Deviant Art
- Referring to the ship as "Shadic" is incorrect, as this is the name used for the hypothetical fusion of Sonic and Shadow.
- Sconadilver - the polyship between Sonic, Shadow, Scourge the Hedgehog and Silver the Hedgehog
- Sonadaze - the polyship between Sonic, Shadow and Blaze the Cat
- Sonadilver - the polyship between Sonic, Shadow and Silver the Hedgehog
- SonShadAmy - the polyship between Sonic, Shadow and Amy Rose
- SonShadSilvAmy - the polyship between Sonic, Shadow, Silver the Hedgehog and Amy Rose
|SHIPS||het||Bartonia • Buntoine • Chaffron • Espade • Espicole • Jetave • Khanally • Knuxerci • Knuxonia • Knuxouge • Knuxulie • Marinic • Minash • Rayream • Shadamy • Shadaria • Shadarine • Shadaze • Shadeam • Shadikal • Shadouge • Silvamy • Silvaze • Silvisper • Sonally • Sonamy • Sonaze • Soneezie • Sonelise • Sonerci • Sonicks • Soniona • Sonouge • Tailerci • Tailrine • Tailsey • Tailsmo • Taiream • Vectilla|
|slash||Espilver • Mephilver • Shadilver • Shadpio • Sonadow • Sonilver • SonMario • Sontails • Sonuckles • Vecpio|
|femslash||Amream • Blazamy • Blazeam • Maream • Marinks • Rougamy • Sallicole • Tangaze • Whispangle|
|poly||Silvazamy • Sonadilver|
|non-binary||Chaoikal • Meteezie • Rookinite|
|cargo||MasterKnux • SonChili|
|CHARACTERS||male||Espio the Chameleon • Knuckles the Echidna • Miles "Tails" Prower • Shadow the Hedgehog • Silver the Hedgehog • Sonic the Hedgehog|
|female||Amy Rose • Blaze the Cat • Cream the Rabbit • Marine the Raccoon • Rouge the Bat|