Technology & Combat Characteristics
The Perfect Zeong was the final unit produced under Zeon's MS-16X Bishop Plan. Using the data obtained from the test runs of the MSN-01 High Mobility Psycommu System Zaku, Zeon engineers drafted plans for a new mobile suit and constructed the Perfect Zeong. Due to the MSN-02's massive size and the vast amount of energy required to power its multitude of beam weaponry, the Perfect Zeong's fusion reactor is 3.8 times larger than that of a standard mobile suit. According to the manga Mobile Suit Crossbone Gundam: Skull Heart, the Perfect Zeong's massive size was due to misconceptions on the battlefield: many pilots at the Battle of Solomon had seen a giant Gundam head and assumed that the Gundam was massive and not Mobile Suit-sized. Everyone was unaware until the end of the fight (and even then, it's still treated as a rumor) that the "giant Gundam head" was actually the B Gundam.
The most notable difference between the Zeong and the Perfect Zeong is the obvious inclusion of legs in the Perfect Zeong. The enormous rocket thrusters mounted beneath the Zeong's skirt armor are now mounted on the bottoms of the Perfect Zeong's feet. As the legs increase the Zeong's mass, in "Perfect" form it would actually have somewhat reduced acceleration, though improved AMBAC capability would make it more agile. Because the Perfect Zeong's size made it impossible to fit into the hangar of any ship, the giant MS had to be tethered to a ship and towed.
History
A total of three Zeong units were built, one of them (which was only 80% complete) was taken by Zeon ace pilot Char Aznable during the Battle of A Baoa Qu.
In Plamo-Kyoshiro, the Perfect Zeong is a custom Gunpla built by American model builder Sacky Takeda. It's actually 1/144 Zeong equipped with a modified 1/100 MS-09B Dom's legs. Takeda also used metallic parts for its antenna horns and equipped it with a beam saber for close combat. He also used optical fiber to add a lighting effect. However, the last feature made it extremely weak against PF-78-1 Perfect Gundam's shoulder water cannon.
The lone unit of Perfect Zeong was completed based on Zeong (Unit No. 3) stationed at Axis Zeon's Ambrosia base and was piloted by Char Aznable. Afterwards, it was dismantled because of the shortage of parts at Ambrosia.