The Neutral Zone is a zone into which Sonic the Hedgehog and many alternate versions of him ventured to find a weapon that held the key to defeating Robo-Robotnik. There is no visible surface to stand on in the zone, and color is removed so everyone who enters appears only in black and white. After retrieving the giant's hand from the zone, the weapon was stolen by Anti-Sonic and everyone headed back to Mobius to face off against the Giant Borg. (STH #19)
- The Netural Zone can be accessed by leaving the Cosmic Interstate between exits. It is possible that the Neutral Zone is the fourth-dimensional space "between" alternate zones, and the Cosmic Interstate exists inside the Neutral Zone, but this has not been confirmed.