>>37946300This is almost exactly right. The Knuckles Tribe of echidna wanted the Master Emerald for the unlimited power it possessed for the purposes of war, and they essentially massacred the peaceful chao that lived/frolicked/existed around the Emerald shrine in an attempt to gather the Master Emerald’s Power.
Granted, this was shown as some low-res echidnas simply running into/over the chao and a girl Echidna, Tikal.
Sonic Chronicles, a Nintendo DS game made by SEGA and BioWare, expanded upon the Sonic Adventure plot to show the Knuckles Trive was actually in combat with another clan of Echidnas: the Nocturnus. Who... locked themselves away in an alternate dimension? And are technologically advanced laser-echidnas? It was not a great game.