The Discovery Zone is a 1930's alternate zone that Sonic unwittingly entered after following a body-less leisure suit, and had a brief adventure there before leaving. It was from this event that Sally believed the malfunction of Dr. Robotnik's Ultimate Annihilator had destabilized the dimensional barriers between parallel realities. (StH: #52)
- Sally Acorn (Discovery Zone)
- NICOLE (Discovery Zone)
- Dr. Robotnik (Discovery Zone)
- Charles Hedgehog (Discovery Zone)
- Sonic's time here seems to roughly follow the Humphrey Bogart movie, Casablanca.
- Some of the robots Sonic fights in this zone are parodies of the robot hosts from Mystery Science Theater 3000, including Crow and Tom Servo. The Robot B-9 from the television series Lost in Space can also be seen.