The Prototype Psycho Gundam was developed with the goal of creating the "ultimate Gundam" using technology from both the Federation and Zeon. Using the RX-178 Gundam Mk-II as its base, the Prototype Psycho Gundam was equipped with wire-guided forearm beam guns, similar to the MSN-02 Zeong, and a scattering mega particle cannon was installed on its chest. It can be controlled using a Psycommu System located in the backpack.
However, the output of the additional generator powering the mega particle cannon was unstable, causing the machine to be immobilized for 10 seconds after firing it. The massive psycommu system installed in its backpack also greatly increased its weight, hindering its mobility. In the end, it failed to achieve its goal.