spinoff of Time Bokan

The wicked Doronjyo and her assistants, Boyakkii and Tonzuraa, are joined together under the direction of their mysterious leader, Dokurobee, on a search for the Skull Stone. This stone is fabled to reveal the whereabouts of a fabulous vein of gold buried somewhere deep within the Earth. Dokurobee sends Doronjyo information concerning the locating of the Skull Stone, then she and her accomplices follow these leads on their search. But... the information is almost always unreliable, and the trio always ends up getting into trouble.

The Yatterman pursue them, and rush to prevent the Skull Stone from falling into the hands of Doronjyo`s gang. The two groups battle for possession of stone as Florina`s gang create a new mecha every program to carry on the fight. Unfortunately for them, the Yatterman and their mechas, always succeed in destroying whatever robots the gang come up with.