The predecessor of all the Gundams in Gundam Wing, Quatre Raberba Winner discovers a copy of the blueprints and constructs it to replace his destroyed Gundam Sandrock. It is piloted by several people, but Heero Yuy is considered its main pilot.
ultracompact fusion reactor, power output rating unknown but estimated to be several megawatts
Performance ability levels:
fighting 150; weapons 150; speed 160; power 140; armor 140 (these numbers are in relation to the OZ-06MS Leo 100 point standard)
Equipment and design features:
sensors, range unknown; "Zero System" combat computer/pilot interface in cockpit; self-destruct system
2 x machine cannon, fire-linked, mounted on torso; 2 x wing Vulcan gun, fire-linked, mounted in wing binders; 2 x beam saber, stored in recharge racks in shoulders, hand-carried in use
Optional fixed armaments:
shield with "piledriver" nose, mounts on main body in Neo-Bird mode
Optional hand armaments:
twin buster rifle, can be separated into two separate single-barrel buster rifles, can be stored on shield, mounts on main body in Neo-Bird mode
Long before the five Gundams were constructed, there was one that existed strictly on paper. It was in the year AC 180, fifteen years before Operation Meteor, that the five scientistsm Doctor J, Professor G, Instructor H, Doktor S and Master O, had just completed designing the first mobile suit of that era, the OZ-00MS Tallgeese. The Tallgeese was redesigned by OZ and the Earth Sphere Alliance in the form of the mass-produced Leos, and seeing the oppression caused by what was originally their handiwork coupled with the assassination of space colony political leader Heero Yuy, the five scientists decided to design their own mobile suit which could drastically overpower OZ's forces. The mobile suit they came up with, was the XXXG-00W0 Wing Gundam Zero. In addition to being extremely maneuverable, the Wing Zero was a transformable mobile suit, capable of transforming into a fighter-like "Neo-Bird mode" for added speed and mobility. Sporting Gatling-like machine cannons, wing-mounted vulcan guns and beam sabers, its firepower was topped by an extremely powerful twin buster rifle, capable of wiping out entire groups of mobile suits and even entire space colonies in a single shot.
However, one more factor put the Wing Zero above all other Mobile Suits: the cockpit's "Zero System," which allowed the pilot's mind to interface directly with the Gundam's combat computer. Although the exact nature of the Zero System's operation is unclear, it appeared to operate by "sampling" the pilot's thoughts and, by combining them with current combat data, presented the pilot with various alternate outcomes. Therefore, depending on the pilot's mood, the Zero System could tell the pilot how to achieve total victory or total defeat. However, the mental stress the Zero System would place on the pilot would be too great for any normal human being to handle. The five scientists, realizing the dangerous implications their work was taking, dropped the Wing Gundam Zero project. A copy of the plans went with each of the five scientists when they broke up and went underground to pursue their own individual plans for revolution against OZ. The Wing Zero design would serve as a base model for the five Gundams that would actually be built and sent to Earth.
In AC 195, Quatre Raberba Winner, having previously self-detonated his Gundam Sandrock, finds himself in space without a Gundam. Through a series of events, his father is killed by a resource dispute started by OZ and the colonists, and the very space colonists he was fighting to free now consider the Gundams enemies. Wracked by a serious mental imbalance, Quatre discovers the abandoned work of the five scientists, and he builds the Wing Zero. Unaware of its dangerous Zero System, Quatre takes off to destroy anyone and everyone fighting in space. Though his mental condition was temporary, the Wing Zero's power proved truly overwhelming, as Quatre used it to destroy an entire resource satellite and an entire space colony. Eventually, Heero Yuy, using theOZ-13MSX2 Mercurius, manages to get Quatre to come to his senses. After that, the Wing Gundam Zero is picked up by an OZ soldier, Trant Clark, who forces Heero to test the Zero System to gather data on its capabilites. Heero himself is temporarily driven insane by the system, and it takes Quatre this time to bring him back to reality. Trant continues testing on it even after Heero and Quatre escape back to Earth, and this time he goes after Duo Maxwell to use as a test pilot. When Duo is forced into testing the Zero System, he too is almost nearly driven insane. Hilde snaps him out of it, but Trant decides to try it out himself and fights Duo in his newly upgraded Gundam, Deathscythe Hell. The fight costs Trant his life, as simply using the Zero System itself causes Trant to die. OZ then tries to destroy the machine, but Zechs Merquise intercepts the demolition team, and using his Tallgeese as a distraction, acquires the Wing Zero for himself. Zechs then tries to use the Wing Zero to help defend the Sanc Kingdom, but arrives too late. Instead, he ends up fighting Heero in the OZ-13MS Epyon, but the battle ends in a draw and they decide to exchange mobile suits. Heero continues to use Wing Zero as his primary mobile suit all the way through till Endless Waltz. At one point Heero lends it to Wufei, and at another it is temporarily stolen by Trowa Barton, but ultimately it stays in Heero's possession for the rest of the show.