Shadow the Hedgehog, Villains Wiki

Shadow the Hedgehog is a major character in the Sonic the Hedgehog franchise. Although he is Sonic's arch-rival, Shadow is not truly villainous; as he is mostly considered an anti-hero mostly due to how he still maintains something of a friendly rivalry with Sonic and has done some questionable things but at the same time from how he has done things such as sacrificed himself to save others multiple times and ultimately sets out to do good for humanity and protect the world in the end. However

Black Doom, Villains Wiki, Fandom

Dr. Eggman (Classic), Villains Wiki, Fandom

Are Sonic and Shadow brothers? - Quora

Smash 3C Shadow [Super Smash Bros. Brawl] [Mods]

Shadow the Hedgehog (Game Character), All Fiction Battles Wiki

Shadow the Hedgehog, Guile Heroes Wiki

Shadow the Hedgehog, Disney Versus Non-Disney Villains Wiki

Doctor Eggman - Wikipedia

Sonic Villains (Web Animation) - TV Tropes