Wonder Gosei Great is a combined mecha from the theatrical film Tensou Sentai Goseiger: Epic on the Movie (summer 2010) and belongs to the Goseiger team. It centers on Gosei Red (Alata), whose personal eagle-type Wonder Headder becomes Gosei Bird, the core of the formation. Goseiger was later adapted in the United States as Power Rangers Megaforce (2013), but the film and this mecha were never part of the US version. As a result Wonder Gosei Great has no official Power Rangers name and remained Japan-exclusive.

The base is Gosei Wonder, a blue jet-like flying machine assembled from five Wonder Gosei Machines/Headders: Gosei Bird, Gosei Kabuto, Gosei Dolphin, Gosei Elephant and Gosei Crocodile. Combined with the standard Gosei Great, it upgrades into Wonder Gosei Great: Gosei Bird forms the upper body and head, the Kabuto element the left arm, the Dolphin element the right arm, while Elephant and Crocodile make up the legs and waist. Its weapon is the Gosei Bird Ax, shaped from the bird's tail, and its finishing attack is the Wonderful Strike.

The DX toy was released by Bandai Japan in the summer of 2010 as a film tie-in within the Gosei Header Series, and is usually sold under the name DX Gosei Wonder (Wonder Gosei Great being the name of the finished combination). The set contains the Gosei Bird machine (wings and tail section), the five movie Headders, and a helmet/head part for Wonder Gosei Great. Like the rest of the Goseiger line it is made predominantly of ABS and PVC plastic with no significant die-cast content. On its own the set forms Gosei Wonder; the full Wonder Gosei Great combination is only possible together with the separately sold DX Gosei Great. As a Japanese movie-exclusive item it was never released as a US Megaforce toy by Bandai America or Hasbro.