Board Thread:General Discussion/@comment-26167440-20160111225919/@comment-27741659-20160210004315

Myself 123 wrote: Word of god says that Shadow needs an emerald to perform Chaos Control, although gameplay and some cutscenes suggest otherwise.

As for the topic question, my assumption is that Sonic just doesn't want to use the ability and sees no need for it. Wow. So logical, it's ALMOST,ALMOST,JUST ALMOST impossible to argue with!