Wing Gundam Zero

Pilot:  Heero Yuy, Zechs, Quatre, Trowa

Registry Number:  XXG-00W0

Height:  16.7 m

Weight:  8.0 tons

Material:  Gundanium

Wing ZERO.  The Mobile Suit that never should have been.  The Wing ZERO is actually the original collaboration of all five Gundam Scientists before each went their separate ways to build their own Gundams.  The brilliance of all five is there, but the power they gave to Wing ZERO, particularly the powerful ZERO System, was just too much.  Though they trashed the idea of building it, they couldn't let it go to waste, could they?

Instuctor H, the tutor of Quatre Winner, hid the designs away safely inside the Winner family computers, until one day...

In Episode 21, "Grief-Stricken Quatre," we see Quatre go through the pain of losing his father ( as well as the loyalty of most of the citizens of his colony ) to OZ forces.  In pain, Quatre seeks vengeance and finds the plans for the Wing ZERO, it's unclear what kind of two-day delivery they have for a Buster Cannon about as powerful as a Super Nova, but Quatre got Wing ZERO built, and quick.

Quatre takes the ZERO and destroys whatever OZ-controled colony he can find with one shot a piece.  That might seem all nice and dandy, but this isn't Quatre.  Quatre is known for his peaceful attitude.  What gives?

The ZERO System makes it so a pilot no longer has to think.  All the pilot has to do is think of an objective and the ZERO System then builds on that objective, making sure it gets compleated down to teh dirtiest deed.  This is what we see with Quatre.

Many people pilot the Wing ZERO throughout the series - Zechs, Quatre, Trowa, Madman #3.  But Heero is the rightful pilot, one of the few who actually masters the ZERO System and can use Wing ZERO to its full extent without going insane.

Wing ZERO is one of the two most powerful Mobile Suits in the series, rivaled only by Epyon.  Its weapons include a Twin Buster Cannon, which can be used separately or combined, a Beam Saber ( surprise, surprise! ), as well as speed that rivals the Tallgeese and a super-powerful shield.

Wing ZERO plays a prevalent role in the final battle, when Wing ZERO is the only Mobile Suit that can stop Zechs from dropping the Libra on Earth and successfully blowing the falling battleships into oblivion.

Of all the Mobile Suits in the series, Wing ZERO is the only one that touches every aspect of the series.  Of course, not too many other piloting systems make their pilots go insane.