[Baltan II]

Translations of the page, and from some of the images shown like the magazine scan, indicate that Thunder Gridman comes with a dummy base body underneath the armor. You'll be able to display him on his own, but the body underneath isn't fully-painted, maybe not painted at all, and what articulation it has if any is unknown. You can see the dummy body by looking at the unpainted red knees in the Thunder Gridman magazine scan.

Basically, this is a lot like a separate, expensive version of the Souchaku Henshin Kuuga or Kabuto figures.