This one is pretty common, but Sonic Boom characters are all older than their usual canon ages. Especially Amy who seems very mature like a motherly figure.
I like to think Sonic, Knuckles and Amy are young adults. Tails is now 12, and is starting to think of dating instead of worrying about cooties. And Sticks is probably 15.
I don’t know. It just seems hard for me to think Sonic and Amy are 15 and 12. Tails also to me, feels more like an adolescent going through puberty.