The Hidden Palace Zone is a large cave located on Westside Island deep below the Mystic Cave Zone. It is lined with thousands of green-colored gems, many of which bare an uncanny resemblance to the Master Emerald.
The Shattered World Crisis
- From a reader's perspective, this picks up from where the original Pre-Super Genesis Wave continuity left off.
After the Master Emerald was once again shattered, Knuckles the Echidna, Amy Rose, and Team Dark came to the Mystic Cave Zone while tracking the source of a unique energy signature. Descending into the cave's depths, the group enter the Hidden Palace Zone, a cavern made mostly of gemstone and crystal, much to the delight of Rouge the Bat. However, the crystal surfaces of the cave began to interfere with Omega's scanners, so Rouge decided they should split up to find their target. (SU: 87)
- The Hidden Palace Zone is based on the scrapped zone of the same name from the video game, Sonic the Hedgehog 2, which was later redesigned and reused as a zone in Sonic & Knuckles). While the level was scrapped from the original game (only being accessible through hacking), it was later restored for the 2013 mobile rerelease, where it was now a single-act stage that could be accessed through a secret entrance in the aforementioned Mystic Cave Zone.