Mashin Zabyun (魔進ザブーン) is a Mashin from "Mashin Sentai Kiramager" (2020–2021), the 44th Super Sentai series. The show was never adapted into Power Rangers and remained Japan-exclusive, so there is no official US name. The name "Zabyun" is the Japanese onomatopoeia for a large splash or wave, reflecting its marine theme: Zabyun is a shark-motif, water-based Mashin born from the Aqua KirameStone to protect Earth's oceans. It does not belong to the core five-member team but is tied to Kiramai Silver (Takamichi Crystalia) and his Mashin Express. Its role is that of an auxiliary Mashin that doubles as a weapon and a combination partner.

In the series, Zabyun moves at extreme speed and can effectively "swim" through solid ground; it uses a shark-inspired sonar detection ability (Lorenzini Search) and fires lasers from its eyes, while its dorsal fin signals incoming attacks. As armament it transforms into four different weapon modes that attach to Land Mage (the ground-based sub-robot of Kiramaizin, made up of Fire, Shovellow and Mach). When it merges directly with Mashin Express, it forms King Express Zabyun – the enhanced, "true" version of King Express, faster and more powerful, which makes the previously required add-on Mashin Jouki unnecessary.

The DX toy is made by Bandai (Japan); because no PR adaptation exists, there was no Hasbro or Bandai America release. It launched in late August 2020 at 5,500 yen and is – as is typical for the DX Mashin line – predominantly plastic; no significant die-cast content is documented. Functionally it converts into four weapon forms for combining with DX Land Mage/Mashin Express and docks into King Express Zabyun; an Aqua KiramaiStone is included. Variants include the standalone release, the bundled "DX King Express & Zabyun" set, and Bandai's separate Shokugan model kit "Super Mini-Pla 05 King Express Zabyun."