depends how you think:
knuckles is much stronger
knuckles is older
tails can fly
tails is sonic first companion
tails is awesome at building.
my favourite is knuckles
Tails is faster than knuckles because, knuckles can't run as fast because of his knuckles
sonic tails knuckles
Sonic is better than knuckles everything shows knuckles is weak knuckles loses every battle sonics better.
Sonic met Tails first, then Knuckles.
knuckles and tails are both awesomer than sonic, they can run just as fast and can punch/fly respectively
no sonic is the worlds fastest, no one is stronger then knuckles and tails he can fly but i wish i could say he could land properly =/
it is sonic tails knuckles
Well they get along.
Actually no, but knuckles is.
Tails and Knuckles.
Actually that's hyper knuckles that's pink, super knuckles is yellow like super sonic and super tails you see this is sonic heroes. super knuckles is also pink (i tried it).
Knuckles isn't in Sonic Unleashed only Tails and Amy and the new characters