Zonic the Zone Cop (Pre-SGW)

Early Interactions
Though unnoticed by Sonic, Zonic was responsible for numerous examples of crossover, including the Universalamander incident, a few Evil Sonic battles, and the Giant Borg incident. Sonic never noticed Zonic's presence until an encounter with Sally Moon, and Dr. Ivanna Robotina, during which Zonic makes his presence known in order to speed up the returning of Robotina to the Luna Zone. Zonic explained that Sonic is called upon often because he is the Prime Zone's Sonic, and is destined to be the champion of all realities.

Giant Borg Crisis
Following this, Zonic brought Sonic to the No Zone in order to track down numerous thefts of Giant Borg Parts committed by Evil Sonic, under the employ of Robo-Robotnik (though his involvement was unknown by all parties at the time). Evil Sonic accidentally gave the pieces to the wrong Robotnik, leading to a battle with the Sonic Underground version of Dr. Ivo Robotnik, where Sonic was aided by his counterpart in that Zone, and Zonic was aided by that reality's version of Sonia the Hedgehog and Manic the Hedgehog in tracking down and capturing Evil Sonic. Once the latter was captured, Zonic imprisoned him in the No Zone, where he added insult to injury by revealing that the Anti Freedom Fighters had named Evil St. John as their new leader.

Interactions with Other Zones
Zonic later stopped an assault from Sallactor (another version of Sally Acorn), just in time to recruit Sonic for a battle with giant monster versions of Sally, Bunnie Rabbot, Knuckles the Echidna, Tails, Rotor, and Amy Rose from the Giant Robotno Mobius. After the battle, Sonic demanded to know how Zonic knew that Sonic would win the battle, even if it meant killing a monstrous alternate Zone version of his father. Eventually Zonic decided to finally reveal his face and identity - he himself was an alternate Sonic.

He later rescued Sonic from another Zone where Evil Sonic framed Sonic for the crime of "Extreme Emotional Anguish and Permanent Mental Scarring" (read as insulting someone) in Litigopolis.

One of the many realities Zonic explored was the possible future universe in the year 4236 where the Freedom Fighters of the Galaxy were the primary defenders. Though not interacting with the people of that universe, he watched to see how events progressed.

Some time later, Zonic was attacked by the escaping Evil Sonic. Wounded, he fled to the Prime Zone where he was found by Sonic, Antoine D'Coolette, and Antoine's father Armand D'Coolette. Sonic took Zonic to Dr. Quack for medical attention. Zonic recovered in time to warn Sonic about Evil Sonic, unaware that Sonic was planning to disguise himself as a villain so that Antoine could take him down and impress his father. By the time Zonic and Sonic arrived, Antoine had already taken down Evil Sonic, thinking it had been Sonic pretending to be the evil doppleganger. Zonic returned Evil Sonic to the No Zone.

Aiding the Chosen One
Much later, Mammoth Mogul attempted to destroy every Zone in existence. Knowing that Mogul only feared Tails, the Chosen One, Zonic recruited Tails' counterparts from all of the Zones (this time equipping them all, and Sonic, with special bracelets that would enable them to be positioned normally in the No Zone). Zonic explained how Mogul got his power, just as Mogul had finished destroying all other Zones save the Prime and No Zones. Zonic's hunch about Tails proved successful as all of the counterparts (plus the original) merged into Titan Tails, stopping Mogul and restoring all of the Zones.

Zone Lockdown
After defeating Scourge the Hedgehog, Sonic brought him to the Cosmic Interstate, hoping to have Zonic provide answers as to why so many alternate-Zone-beings had been allowed in the Prime Zone for so long. They were soon found by Zespio and Zector and brought to the No Zone, which lay mostly in ruin. Scourge escaped and decided to finish the job, but Zonic caught sight of him and ordered the Zone Cops to arrest him. During the brawl, Zonic met up with Sonic and revealed that the Zone Cops had been busy fighting a war against a villain called Dr. Nega who was wreaking havoc in the No Zone and across the Multiverse. To counter this, they shut down the connecting paths between most Zones, only leaving a few open for stability's sake. They quickly captured Scourge thanks to Sonic's skill and Zonic's special Control Collar. Sonic then asked Zonic when he was taking away Eggman, but he explained that Sonic-Prime needed to fight a Robotnik to keep his zone stable, as the original Robotnik's erasure (rather than natural death) had caused an unusual situation. He also mentioned that Scourge, having been mutated, was now a wild card in terms of Zone balance. He then arrested Scourge and ordered his officers to take Sonic home.

Some time later, Zonic took part in apprehending the Destructix when they violated the pan-zonal lockdown and reacted with extreme violence against arresting officers. Realizing all five mercenaries had ties to Scourge, Zonic personally oversaw their delivery to Zone Jail. While enroute with fellow officer Zector, they detected a significant dimensional breach originating in the Prime Zone where their new prisoners had just arrived from, but Zonic did not believe the two events were related. Concerned, he then spoke with Warden Zobotnik while unloading the prisoners, having a brief yet tense exchange with him to keep an eye on Scourge's old associates, particularly Fiona Fox, and then left to investigate the new incident in Mobius Prime. Finding that zone to be a mess, Zonic returned to the prison days later when reinforcements were called in to help suppress a riot that resulted in Scourge's escape with the Destructix. Meeting with Warden Zobotnik again, Zonic pointed out that he did warn him, and when asked about pursuing Scourge, said it was impossible with their resources spread between the situations with Nega, the Prime Zone, and the prison itself. Zonic then went on to state they believed Scourge had somehow gone back to his homeworld, and the best they could do was just hope he stayed there.