User blog comment:'Sonic the Hedgehog'/Knuckles is mad at Sega/@comment-94.172.118.186-20110625154426/@comment-477304-20110718184702

The only sources we have is the Sonic 3 manual and the Sonic Jam profiles, I don't know about Knuckles' Sonic Jam profile, but the Sonic 3 manual states he's 15 years old