PF-78-1 Perfect Gundam is a fictional mobile suit from the Mobile Suit Variations (MSV) line in the Gundam franchise. It is a heavily modified prototype based on the RX-78 Gundam, designed to serve as an upgraded, heavily armored combat machine. Rather than a human character, it functions as an iconic variant unit and showcase design, representing experimental engineering and alternative battlefield performance. It is best known as a distinctive custom Gundam used in model and side-story contexts.