Sonic is 15 in Sonic X.
Sonic is referred to as 15 in all of the modern media he's related to.
Sonic the Hedgehog: 15Tails: 8Amy Rose: 12Knuckles the Echidna: 16Chris Throndyke: First series, 12. Second series, 18 but in a 12 year old body.Chuck Thorndyke: First series, 55. Second series,...
Above 50.
First: bunnie is not in sonic x only in comics second: I don't know how old