The MRX-009 Psycho Gundam (aka Psyco Gundam) is a transformable mobile armor introduced in Mobile Suit Zeta Gundam.

Developed by the Earth Federation Forces' Murasame Newtype Lab as a Cyber Newtype-use machine, the Psycho Gundam incorporates several concepts from the MSN-02 Zeong. At 40 meters tall, it is more than twice the size of a regular mobile suit. This is due to the sheer bulk of the Psycommu System, and the addition of features like a Minovsky Craft System, an anti-beam barrier as well as complex transformation mechanisms. Classified as a large Mobile Armor (MA), it can transform into a Mobile Armor mode known as "Mobile Fortress Mode" that is capable of atmospheric flight thanks to the Minovsky Craft System. Plans for a "Mobile Fortress" in the base defense role were drafted after the One Year War.

The Psycho Gundam is entirely controlled by the Psycommu System, and as it was designed to be used by Cyber Newtypes, it cannot be handled by normal humans as the psychological burden is tremendous and potentially fatal. The Psycho-Control System allows the pilot to control Psycho Gundam via remote operation when apart. Besides the superb defensive capabilities offered by the anti-beam barrier, the Psycho Gundam also has overwhelming offensive capabilities, and is armed with 3 diffuse beam cannons in its body, 10 beam cannons in its fingers, and 2 small mega beam cannon in the head. Two units were produced in total.