Board Thread:Speculation, Theories, and Rumors/@comment-25912037-20141223043619/@comment-24658561-20150529134243

Myself 123 wrote: Er... Knuckles can't fly, he can glide which is rather different to flying.

Additionally, Knuckles' connection to the Master Emerald is rather limited; he can sense emeralds and Master Emerald pieces, but that's about it, he hasn't demonstrated use of any Chaos Powers, at least not in the games, anyway. Although he can shut down the power of the Chaos Emeralds, it does require reciting a prayer, which I doubt Shadow would just allow Knuckles to do. In the movie he does fly(it's not canon, but he does there) and he himself calls this gliding flying in the games so however you wanna call it, he can't do that in X. As far as I know this gliding is Chaos Control too and Shadow can't do that. He can do different things like teleporting.

And Knuckles is stated to be a living Chaos Emerald, so he possibly could do a lot with the powers, he just never does shit because since SA2 the games didn't focus on him anymore. In the comics, he is very powerful, but as I said, the games don't treat him that good. (Looking at Sanik Bum.)

Shadow on the other hand is a fan favorite and as long as SEGA can squeeze fanservice out of him, they'll do it.