Board Thread:General Discussion/@comment-26167440-20160111225919/@comment-26253917-20160201064355

Really, becuase I know that Super Sonic will have to focus on getting more rings if he is low on it than actually focusing on his threat.

Excatly. When the Chaos Emeralds have fufilled a purpose, they will go back to the special zones and recharge. As to how the Chaos Emeralds know, remember when the Chaos Emeralds were needed to make the fusion of Solaris. Once that was done, they scatter and was needed to be recollected again. Also, in Sonic Runners, Sonic said that the Chaos Emeralds will be there in his time of need so I think if they know when they are needed, they will know when they have fufilled that reason until Sonic gets them.