This kit is the SD Daisenki Gundam, released as part of the Shin SD Sengokuden Mushin Kirakou series. Its defining feature is the top it carries on its back, and it also includes a transformation gimmick into a Musha Gelgoog. Parts-wise, two runners from the SD Kouki Gundam are reused, though the overall look feels quite different.
First off, the top can be detached along with its wings and spun by gripping the tip like an old-school acorn top. You can also remove the wings to use it as two different smaller tops. These smaller tops have trigrams or numbers printed on them, so they can double as a separate game piece too. On top of that, you can attach the spinning section to Daisenki Gundam's chest and the tip to the back, letting the whole body spin like a top — the variety of top-spinning play options is really the highlight of this kit.
Folding the wings forward and rotating the helmet 180 degrees transforms it into a Musha Gelgoog — and despite the minimal transformation steps, it pulls off a surprisingly convincing Gelgoog silhouette. Since the Kouki Gundam's runners are reused, there are some leftover parts, and unlike previous releases, the manual being split into color and black-and-white sections is a bit of an unusual touch.
All in all, this is a unique SD Musha Gundam built around the top-spinning concept — if that kind of thing is your style, it looks like a pretty fun kit to enjoy. :-)
AIThis page was translated by Claude Sonnet.