The Mystic Cave Zone is a large cave located on Westside Island.
After defeating Dr. Eggman and his assistant, Dr. Julian Snively, at their base on South Island, Sonic the Hedgehog chased the two mad doctors down to Westside Island, where he teamed up with his new sidekick and best buddy Miles "Tails" Prower as well as the Knothole Freedom Fighters. They arrived in Mystic Cave Zone after passing through Hill Top Zone in their efforts to defeat the mad doctors, whose goal on Westside Island was major construction and refinements as part of their plan for world domination. From here, they chased them down to Oil Ocean Zone. (VG: StH2, SSD: #12)
The Shattered World Crisis
- From a reader's perspective, this picks up from where the original Pre-Super Genesis Wave continuity left off.
Later down the line, Knuckles the Echidna, Amy Rose, and Team Dark came across the cave while tracking the source of a unique energy signature. Descending into the caves depth's, the group entered Westside Island's very own Hidden Palace Zone. (SU: 87)
- Mystic Cave Zone at Sonic News Network