Dr. Eggman Nega

Dr. Eggman Nega, also known as Dr. Nega and Eggman Nega, is a mysterious villain and "mad man" who went to war with the Zone Cops. Traveling across the Cosmic Highway, Nega's actions caused severe chaos across the multiverse. For this reason, the Zone Cops issued a lock-down on the various universes, leaving only a few open to maintain stability. Nega's war with the Zone Cops resulted in massive damage to No Zone. Because of this, the Zone Cops were too preoccupied making repairs to deal with the Suppression Squad's invasion of Mobius Prime. (StH: #189, #197)

Sonic the Hedgehog, Tails, Blaze the Cat and Marine the Raccoon had a brief encounter with Nega while fighting against Captain Whiskers and Johnny. (SU: #1)

Dr. Nega would later fly an insect-like aircraft carrying a mysterious capsule to the Prime Zone using a portal while being chased by two Zone Cop vehicles. As he fired at the Zone Cops, one of them fired at the craft's legs, dislodging the capsule. Nega then escaped the Prime Zone using another portal, with the Zone Cops still in hot pursuit. (SU: #21)

Background information

 * Dr. Nega was never referred to by name in Sonic Universe #1, though his silhouette can be seen in the issue, and notably, he appears to have a similarly shaped body to that of Dr. Eggman. It was only hinted that he was Dr. Nega in one of the caption boxes in Sonic the Hedgehog #197.
 * Dr. Nega's full name is Eggman Nega. He is Dr. Eggman's alternate counterpart (descendant in the two Sonic Rivals games) from in the Sonic game series. His appearance and full name are currently limited in the comics due to issues with SEGA, but Ian Flynn hopes that that will be rectified in the future. (1)
 * When Dr. Nega was chased by the Zone Cops, it was mentioned he illegally crossed 47 zones.
 * Dr. Nega made in unofficial appearance in Sonic Universe 24's Off-panelDr._Nega-Off-Panel-1-.jpg, in which he talks with Sonic on how they received limited appearances in the arc.
 * Dr. Eggman Nega was finally officially revealed in The Complete Sonic Comic Encyclopedia.