Zanscare's mass-produced space mobile suit, the Zoroat.
Despite being developed before Zoro, who appears early on, it appears from episode 15 onwards.
The battle scene in which it toyed with the V Gundam piloted by protagonist Uso, who had overwhelmed Zoro in gravity combat, was impressive.
It's not hard to see why the Shakko, which appeared in episode one, was used so heavily as a product, but personally I'd like to see more of the spotlight on this mass-produced mobile suit, the Zoroat.

1/144 Zoroat | ガンキチ's Gunpla works