Board Thread:Speculation, Theories, and Rumors./@comment-24261123-20140201151719/@comment-26808654-20140506030422

Actually, Knuckles is way less mature now than he was in Adventure 2 and heroes.

Still, I'm going with Sonic being 16. He was confirmed 15 in Black Knight and his birthday happened in Generations, a game that clearly took place after Black Knight (and other games claiming Sonic to be 15).

15 then a birthday party. Do the math...