This article will explain the Z-Zaku, a Z Gundam and Zaku combined, which appeared in the Mixing section. The setting is "Mobile Suit Gundam ZZ," the sequel to "Mobile Suit Zeta Gundam."
The protagonist, Judau, is on an advance mission to receive supplies at La Vie en Rose when he sees a pile of wreckage from the One Year War. His bad habit from his junk dealer days resurfaces, and he finds a Zaku that is almost undamaged. He abandons his mission, retrieves it, and begins to return to the Argama on his own. Seeing this, Roux says she will go and retrieve it herself, and Leena sets off from the Core Base to scold her brother.
However, at that moment, the End, led by Chara, attacks La Vie en Rose.

Zaku Z Explanation | ねぎ坊主's Gunpla works