Originally running between 1977-1979 for 108 episodes, Yatterman succeeded Time Bokan and followed what happened after fragments of a mysterious stone known as the Skull Stone are scattered across the globe. Once all four pieces of the Skull Stone are assembled, the location to the world’s largest deposit of gold will be revealed.

The evil Doronbo Gang continue to search for the stone as they wish for the gold to finance their illegal schemes but opposing them are Gan Takada (voiced by Yoshiko Ohta) and Ai Kaminari voiced by Mari Okamoto) who become the masked heroes Yatterman-1 and Yatterman-2. The two are aided in their adventures by a large mechanical dog Yatterwan.