As of 2012 he is 21 years old (not his age but his over-all series)
Sonic is about 13 years old on Sonic Underground. On the Sonic Wiki it says Sonic is 17 years old.
In every Sonic game Sonic is about 15 years old.
Tikal's age isn't ever specified but it is implied that her spirit has been trapped in the Master Emerald for at least several decades.
Not really, Sonic Unleashed was on xbox 360, wii, and some other consoles. An old sonic would be on a cartridge but Sonic Unleashed was on a disc, so it's not that old. 2008 was when it came out, but no Sonic Unleashed is not an old sonic game.
He is 15 years old.
Sonic in all modern games is 15 years old.
17
a old sonic character in the old tv show and comics
In 2099, Sonic the Hedgehog will be 108 years old.
There are no official Sonic couples.
16 or 15.
11