Board Thread:General Discussion/@comment-26167440-20160111225919/@comment-26253917-20160202054708

Yeah, and to be fair, they needed some weakness for him. Super Sonic is the same guy that took down mutiple gods and can not be physically harm. Other than gameplay mechanics, I would say that your reasons is spot on.

I would also say that he probably starts collecting them when he body is starting to give in and can not take any more energy.