The Void

The Void was a pocket dimension adjacent to Mobius that Dr. Ivo Robotnik used as the test destination for his Transdimensional Transporter. His attempt to send the Robian Sir Charles Hedgehog there resulted in his own imprisonment and Sir Charles' regaining his free will. Snively Kintobor promptly assumed control of his uncle's empire and sought to imprison the Knothole Freedom Fighters there as well. He succeeded with Sonic the Hedgehog, only for his scheme to be thwarted. Later, the evil wizard Ixis Naugus fused the Void together with the Zone of Silence, and the united zone was reshaped into the Special Zone by Feist using the power of the Chaos Emeralds. (StH: #30, #163, #170)