Board Thread:General Discussion/@comment-24270839-20131212055952/@comment-25348898-20140826195651

There was too much in my comment and the bottom got cut off. :(

Basically, I came up with an idea based off of Amy's age.

Between Classic and Dreamcast Era, three years past. I used the big difference between Classic Amy and Adventure Amy.

Dreamcast to Modern? One year. Because Sonic shows the biggest change this time, but it's still not much at all.

Sonic: Classic = 12, Dreamcast = 15, Modern = 16.

Tails: Classic = 8, Dreamcast = 11, Modern = 12

Knuckles: Classic = 13, Dreamcast =16, Modern = 17

Amy: Classic = 8, Dreamcast = 11, Modern = 12

Vector: Classic = 16, Dreamcast =19, Modern = 20

You can figure out the rest.