RX-78GP00 Gundam "Blossom"

The RX-78GP00 Gundam GP00 "Blossom" first appears in the B-Club Gundam -Phantom Bullet magazine, and subsequently Dengeki Hobby Magazine "Gundam Secret Weapons" and Gundam Wars series. Although the existence and details of this machine in canon plot are disputed, the GP00 is said to be a model tested before 01~04 was designed and was the first of the Gundam-development Project series. This unit never appeared in 0083 Stardust Memory.

Technology & Combat Characteristics
The Gundam Blossom was a test unit developed by Anaheim Electronics at the lunar city of Von Braun as part of the Gundam Development Project and used the existing Core Block System of the RX-78-2 Gundam, which was then designed to dock with the FF-X(7)II Core Booster II and support experimental equipment such as the long-range beam rifle and the Minovsky Particle Interference Wave Searcher (MPIWS). The prototype long-range beam rifle did not feature a standard E-Cap system, and had a long recharging period after firing. The MPIWS was a large high-performance sensor powerful enough to detect wreckage on the lunar surface from a high altitude, but its reliability was low and frequently malfunctioned.

History
This model was to be designed to contain all the special features and concepts of the GP series (and therefore if this one had actually succeeded, all the other four would not have been designed.). However, the configuration shown here as the primary test run only contains a long-range beam rifle, a multi-sensor and a core fighter. The machine was destroyed, but it is disputed as to exactly how. In Phantom Bullet (the original appearance of this mobile suit which is an unofficial side story) it says: "Destroyed in a combat against Zeon forces." In Dengeki Hobby Magazine "Gundam Secret Weapons", it says: "Caught in the collapsing wreckage of an abandoned ship." In the Gundam Wars card game (the first official appearance of the mobile suit with detailed design as shown in picture), it says: "Due to all the equipment, the balance of the machine is lost and self-destructed on the test run."

No evidence points to one explanation being more accurate than the others. However, a combined story might have been: "During a test run, GP00 encountered Zeon forces and was forced into battle (just like GP03 in Gundam Evolve 4). While battling Zeon forces composed of YMS-16M Xamel mobile suits, due to all the equipment, the balance of the machine was lost. After losing control, the machine crashed into the collapsing wreckage of an abandoned ship (which was abandoned due to the battle) and is destroyed." However, the most important part is "It was destroyed due to an unbalanced design", Thus leading the project team on separating the features into different units, which were RX-78GP01 Gundam "Zephyranthes", RX-78GP02A Gundam "Physalis", RX-78GP03S Gundam "Dendrobium Stamen" and RX-78GP04G Gundam "Gerbera".