The MSN-01 Psycommu Test High Mobility Type Zaku is an experimental mobile suit introduced in the design series Mobile Suit Variation.
This is a modified version of the second MS-06Z Psycommu System Zaku unit. When the model number of the Zeong was changed from "MS-16X" to "MSN-02", this machine's model number was also changed to "MSN-01". Because the MS-06Z had limitations in collecting data on the Psycommu system during high-speed maneuvers, the legs were omitted on this machine and replaced with two sets of high mobility thruster units, each equipped with four large, high output, thermonuclear rocket engines. This gave it mobility comparable to that of a mobile armor.
However, as the mobile suit's propellant capacity could not keep up with the added rocket engines, it could only be used for a short time. Despite this, the machine was able to collect valuable data that contributed to the Zeong's development. Furthermore, its test results also revealed the limitations of a Zaku-II based design, leading to the development of the Zeong as a completely new machine. Although a test machine, there were records of it participating in the defense of A Baoa Qu along with the MS-06Z.