Board Thread:Site Discussions/@comment-4261830-20131126061039/@comment-679780-20140215000701

BlueSpeeder wrote: NipsterXLI wrote: Mystic Monkey wrote: Chaos Emeralds not in Boom?

Probably will show up in later seasons, depending on the setting of this new Mobius. AoSTH didn't have Chaos Emeralds until much later on. SatAM without any. Sonic X had them of course I believe only Sonic Underground and SatAM didn't have the Chaos Emeralds. Sonic Boom not having Chaos Emeralds is okay for me.

Sonic Udnerground did have the chaos emeralds, but they functioned different from the norm. There were two major chaos emeralds, both green. One regarded as the Master Emerald on the Floating Island and another emerald which Dr. Robotnik used to charge his Fortress of Altitude.