the biggest proof of age in fiction meaning nothing is the ages in sonic
amy aged 4 years between cd and adventure
tails aged 0 years, and is now younger than amy
knuckles has aged 1 year
charmy aged -10 years
vector aged 4 years
espio aged -1 years

and CD is canon to adventure

archie was forced to give charmy brain damage because of this

flynn is clearly horny for lynx nicole and she's negative years old because she was a computer from the future

SILVER IS YOUNGER THAN SONIC