Shadilver

Shadilver is a canon slash ship between Shadow and Silver from the Sonic the Hedgehog fandom.

Canon
Silver and Shadow first met during the events of Sonic the Hedgehog when Shadow protected Sonic from Silver. Silver, mistaking Shadow for Mephiles, was confused by this, as Mephiles was the one who had given him the task to kill Sonic. Shadow and Silver fought until Shadow explained the truth about Mephiles and Iblis. The two went 10 years into the past, where they sealed away Mephiles and Iblis.

The two met later when they were among the ones appearing in Solaris' dimension. Shadow and Silver teamed up with others in this realm to find the Chaos Emeralds in order to resurrect Sonic. The two then turned into their Super forms along with Sonic to defeat Iblis.

Since the events of the game were erased from the timeline, their original meeting never happened. Instead, they met in Sonic Rivals, where they started out as rivals as Shadow did not trust Silver's speculations on Dr. Eggman's identity. When Shadow found out Silver was right, the two teamed up. In Sonic Rivals 2, the two were rivals again and fought each other at some points.

In Sonic Generations, Shadow and Silver both appear as Modern Sonic's rivals. They later cheer the two Sonics on during their battle against the Time Eater and attend Sonic's birthday party at the end despite being absent at the beginning. In Sonic Forces, Shadow and Silver were members of the Resistance fighting against Infinite.

Shadow and Silver have custom victory animations in some of the Mario & Sonic games. In the 3DS version of Mario & Sonic at the London 2012 Olympic Games, Shadow and Silver are the two Sonic characters of the Challengers group and they appear together in story mode. The pair has custom victory poses in Mario & Sonic at the Sochi 2014 Olympic Winter Games and Mario & Sonic at the Rio 2016 Olympic Games.

Fanon
Shadilver is among the most popular slash ships in Sonic, but it is less popular than Sonadow. Shadow and Silver are often associated with each other by fans, but most of the time it is not romantically. On AO3, it is the second most written ship for both characters, behind Sonadow and Silvaze.

There have also been a few fans who have Shadow has Silver's father, due to the fanon family fanbases that circles around Shadouge, Shadamy and a few other het ships involving Shadow. Along with there being a small group of fans who base some of their Shadilver fanart on their alternate reality doppelgänger selves from Sonic and the Black Knight.

Fandom
FAN FICTION
 * Silver/Shadow tag on FanFiction.Net
 * Silver/Shadow tag on FanFiction.Net

DEVIANTART

Trivia

 * In Sonic and the Black Knight, Shadow and Slivers' alternate reality doppelgängers are two notable Knights of the Round Table from the Arthur Legends, Sir Lancelot and Sir Galahad. Lancelot is part of the game's main storyline, while Galahad can only be seen or played during free play.