This character exists primarily or exclusively within the Pre-Super Genesis Wave continuity. Information in this article may not be canonical to the storyline of the games or any other Sonic continuity.
Ixis Naugus' early history was most likely largely the same as his Mobius Prime counterpart's. The point of divergence was when Knuckles became corrupted by his chaos powers and decided to conquer Mobius. Eventually, Naugus joined the countless heroes and villains alike that fell to Knuckles, now having assumed the mantle of Enerjak, and had his Core removed.
After the loss of his Core, Naugus's body was hung on the inner walls of Enerjak's Citadel like a trophy.