sonic is only related to sonya and manic the hedgehog acording to birth in sonic underground shadow on the other hand was created using sonic's DNA so there is somewhat of a relationship in DNA
No. I can't even imagine a world where Sonic and Rayman are related.
In Sonic Underground Queen Aleena is Sonic's mother.
yet, no. scourge is NOT sonic's brother
sega is the owner of sonic the hedgehog and all sonic related characters
there both hegehogs
If you are talking about the shade in Sonic Chronicles the Dark Brotherhood, no. Because Shade is an echidna, and she is against sonic, so why would you think that they are related?
Sonic is referred to as 15 in all of the modern media he's related to.
The last answer was not that helpful. Sonic and/or Silver the Hedgehog are not related. In the show, Sonic Underground, Sonic's had only 1 brother and only 1 sister. His brother was Manic and his sister was Sonia. Sonic does not have any more siblings. Silver is just a hedgehog from the future, not Sonic's brother.
No.
No crash is not in any way related to sonic, other than that they have both become wildly popular!
The prefix "sono-" is used for sonic, which means related to sound.
Genetically? No... But Cream and Sonic appear in the same games like sonic heroes and sonic advance, but they are not cousins or anything.