Thread:APHMAULOVER1999/@comment-1398428-20200207144510

Since that was removed from talk page, I will responding it here instead.

No, they are not. Shadow is at least fifty years older than Sonic. And by SEGA's character policy, Sonic can't have a family. Ergo, Sonic do NOT have a blood-related brother, let alone be Shadow or Silver's.

However, Sonic is a brother feature to Tails, like Amy Rose is a sister feature to Cream and Blaze to Marine. The reason they are like that is that they're very close in the friendship and as often as partnering together on the adventure.

So in reality, Shadow and Sonic are more of rival, higher than Sonic with Knuckles. Sonic is on the justice side and has a careless attitude, in where Shadow is cold and calculated and wants to accomplish his goal no matter what happens.

Hope this helps. 