Technology & Combat Characteristics
The AMS-123X-X Moon Gundam is the AMS-123X Varguil equipped with a Gundam-type head and repainted in tricolor scheme. Additionally, the backpack's funnel rack has been completely removed and a sub-arm has been added to mount the Psycho Plates. The Psycho Plates is a Psycommu armament that drifted to Moon Moon along with the head.
History
After the Earth Federation Forces received information that Char Aznable, who went missing after the Gryps Conflict, was plotting an armed uprising against the Federation, it deployed several search forces to various Sides. During one of the searches, Amuro Ray's Londo Bell squadron encountered a group of Titans remnants and engaged in battle against the MRX-013-3 Psycho Gundam Mk-IV G-Doors. Equipped with a new type of Psycommu armament, the Psycho Plates, the G-Doors was able to surprise Amuro briefly before he shot it down. Following the battle, the head and 8 of the Psycho Plates drifted to Moon Moon, colliding with the colony's walls a year later. At the same time, Neo Zeon's Atlante 3, which was disguised as a cargo ship, was in battle near Moon Moon against Londo Bell's Ra Gills cruiser and entered the colony.
The G-Doors' head was recovered by Moon Moon's inhabitants and brought into the colony, occasionally reacting to the presence of Newtypes such as Jutta Qasim and Mineva Lao Zabi. In an attempt to make use of the G-Doors' head, Neo-Zeon attached it to the AMS-123X Varguil, as it was the only available Psycommu MS. While initially not connecting to the Varguil due to insufficient psychowaves from Cyber Newtype pilot Agos Lagarto, the G-Doors' head would be remotely activated by Jutta later. This caused the head to override the Varguil's systems and make the Psycho Plates compatible with the Varguil, resulting in the Psycho Plates freeing themselves from the colony walls and attaching themselves to the Varguil in a crescent shape after entering the colony. Following this, the MS was repainted in a tricolor scheme and renamed the Moon Gundam.