The Hidden Palace Zone's early history was most likely largely the same as its Mobius Prime counterpart's. The point of divergence was when Knuckles became corrupted by his chaos powers and decided to conquer Mobius. During G.U.N.'s offensive against Knuckles, now going by Dark Enerjak, the Hidden Palace Zone was invaded by Team Dark to secure the Master Emerald. After neutralizing all resistance in the Zone, Team Dark obtained the Master Emerald, only to disappear upon engaging Enerjak.