Work No. 21
Original Setting Explanation
This mobile suit is a redesigned version of the Wing Gundam Zero, which was sealed away due to its excessively high danger level, by Dr. J alone, with reduced danger.
The Zero System, which was considered particularly dangerous, and the Twin Buster Rifle, which had excessive firepower, were removed, and adjustments were made to prioritize ease of use.
Ultimately, this unit also remained only a design, but it is said that Dr. J later developed and manufactured the Wing Gundam based on this unit's design.

Wing Gundam Re:Zero | ポポロンMk-II's Gunpla works