Negative Reality

The Negative Zone (also known as Negative Reality) is the zone that Sonic, Tails and Antoine were stranded in for a few hours after trying Rotor's Timespace Matter Projector in order to locate the Zone of Silence, which held Princess Sally's father, King Max. NICOLE blamed her inability to immediately recall the three on the fact that the Negative Zone interfered with her systems. It was during the three's absence that the Anti Freedom Fighters arrived, with Scourge, Patch and Miles masquerading as their counterparts in order to frame them. (StH: #24)

It has not been mentioned since.