TOMY Shuckle Figure

The first official and classic Shuckle figure, made by TOMY and released February 2001¹. The head is a separate piece and therefore painted separately, which is probably why this figure is often found with a different shade of yellow on the legs.

It's part of the Monter Collection set (モンスターコレクション), often shortened to just MonColle. It can still be found sealed in the original package.

The bottom side says:

©Nintendo
CGTSJ
TOMY
MADE IN CHINA