Board Thread:General Discussion/@comment-26167440-20160111225919/@comment-679780-20160131063633

It does because Super Sonic is hella powerful and all Chaos Emeralds are needed. The Chaos Emeralds powers ar einfinited but not unlimited. The ammount of power all seven emeralds give off are required for Sonic to become Super Sonic, n deity god like character. Super Sonic isn't the first unlockable super transformation games have done (well he could be the first) theres also Fierce Deity Link and Abe from Oddworld can turn into Shrykull. They were unlockable OP bonuses for once certain conditions in there respected games are met.

There were no humans, but other than Neo Metal Sonic who is an upgrade of Metal Sonic, no one new was introduced other than Team Chaotix who were reintroduced in the series since we haven't seen them since Knuckles' Chaotix.

Perhaps, there can be a number of factors. What we know for sure though is almost every new game, the Chaos Emeralds need to be recollected and are either found inzones or in the Special Stages. the following game with the emeralds the process starts over again.