The Hidden Zone is completely covered by a cloaking device, making it the perfect hideaway for people wanting to remain safe from Doctor Robotnik and rule over Mobius - if civilians could even find it. Robotnik wished to invade the Zone for years, knowing that the area held many treasures. He was finally able to locate the hideaway when Sonic the Hedgehog fell from the Sky Fortress right into the Hidden Zone, which Robotnik was able to track and destroy. No longer safe, the inhabitants fled to the Emerald Hill Zone. A similarly-named story showed a Badnik created by Grimer that used a cloaking device to make itself invisible. After causing a lot of damage to the Tropical Jungle Zone, it was revealed by Sonic who coated the wearer in wet leaves before damaging the system itself.