This is a hard question even for me.LOL. i'll post the answer Saturday october 24th who ever guesses the right answer will get a part in my new video im makeing with shadow, sonic, knucles, tails,Rouge,And robot sonic the video will be on newgrounds

he's immortal cuz in the comics when sonic wuz about 41 he wuz fighting shadow and shadow wuz saying how sonic wuz an "old man" and th@ he's not as quick as he use to and th@ he(shadow) is still young and stronger than him

thanks

It was said that he was 50+ years old but I think physically he's about Sonics age so he's probley 15.but really he's ageless though.

First he maybe the ultimate life form doesn't me he is ageless or immortal he is still a lifeform meaning he could and second he is little bit taller than sonic meaning he is older than sonic and third he was made 50 years ago meaning he should be 50-69 years old because he was born and then frozen in a time chamber which also means he has not show any sign of age. Come on people you call yourself sonic the hedgehog fans. if u don't believe me watch sonic x or another show like futurama.

and the fist me is supposed to be mean and at the end of the first could there was suppose to be die and that is all.

^sonic is non-canon to the games
the comics as well

He's should just be around 50