The MSN-00100 (MSN-100, MSN-001) Hyaku Shiki is a prototype attack use Mobile Suit from the Universal Century timeline. The unit was featured in Mobile Suit Zeta Gundam and Mobile Suit Gundam ZZ. It was primarily piloted by Quattro Bajeena during the Gryps Conflict and later Beecha Oleg in the First Neo Zeon War.

The Hyaku Shiki (codename: "δ Gundam" (Delta Gundam) is a mobile suit built by Anaheim Electronics as part of the "Zeta Project". Originally designed as the MSN-001 Delta Gundam, the unit was intended to be a test unit for the transforming MSZ-006 Zeta Gundam by incorporating the "movable frame" technology found in the RX-178 Gundam Mk-II and back-pack wing binders for additional mobility, though defects in the frame design rendered it incapable of transforming to mobile armor mode. As a result, the suit was redesigned into its current state, whereby it functions as a high performance MS. The Delta Gundam's transformation capabilities would later resurface in the MSN-001A1 Delta Plus. The Hyaku Shiki's gold colored appearance is due to the application of a beam-resistant coating on its armor, giving it some limited protection against beam attacks. The suit also has a unique sensor called the Image Directive Encode (IDE) system, which emits a red pattern when scanning or during precision aiming.