HG 1/144 FXA-05D / RX-178 - Super Gundam [2002]

The RX-178+FXA-05D Super Gundam is a mobile suit introduced in the anime Mobile Suit Zeta Gundam. Piloted by Emma Sheen, it is the combination of the FXA-05D G-Defenser and the RX-178 Gundam Mk-II.

To increase the RX-178 Gundam Mk-II's combat capabilities to match those of the Titans' transformable mobile suits, Anaheim Electronics developed the FXA-05D G-Defenser support fighter, which can dock and power up the Gundam Mk-II. This combined form is technically known as the 'Mk-II Defenser', but is more commonly called the Super Gundam due to its performance.

Lore excerpt from gundam.fandom.com.