Cube Koumori (Japanese コウモリ, "bat") is an auxiliary Zyuoh Cube from Doubutsu Sentai Zyuohger (2016), the 40th-anniversary Super Sentai series built around an animal theme. In the show the Zyuohgers collect "Zyuoh Cubes," dice-like objects that unfold into animal mecha. Cube Koumori is a navy bat-type cube and is deliberately not one of the six core cubes, the "King's Credentials" (Eagle, Shark, Lion, Tiger, Elephant, Gorilla): instead of a number it bears an exclamation mark (!), marking it as an extra cube standing outside that set of six. Because Zyuohger was never adapted into a Power Rangers season (Power Rangers went from Ninja Steel/Ninninger straight to Beast Morphers/Go-Busters), Cube Koumori was never released as a Power Rangers toy and has no official US name — it is Japan-exclusive.

Its signature gimmick is a three-step conversion: from a compact cube (Zyuoh Cube) it folds into the Cube Animal (the bat) and from there into a Cube Weapon, the Koumori boomerang. As a weapon it is sized for Tousai Zyuoh but can also be wielded by Zyuoh King and Zyuoh Wild. Within the larger combinations the bat forms fixed structural parts — the upper right ankle of Wild Tousai King and the right elbow of Wild Tousai Dodeka King — and serves as the final piece needed to complete the Wild Zyuoh King formation.

The DX toy was made by Bandai Japan and released in July 2016 at ¥1,000 as a separately sold single figure in the "Cube Busou" (Cube Weapon) sub-line. Like the other Zyuoh Cubes it is plastic (ABS/PVC) with no meaningful die-cast content. A few folding steps convert it between cube, bat and boomerang and let it attach to the larger DX mecha. It belongs to the smaller supplementary cubes of the range rather than the big flagship sets, and was distributed only in Japan.