Season 2

Fragments of a mysterious stone known as the Skull Stone are scattered across the globe. Once all four pieces are assembled, the location to the world's largest deposit of gold will be revealed. The villainous Doronbo Gang are searching for the Skull Stone. Standing in their way are Gan and Ai who become the masked heroes Yatterman-1 and Yatterman-2. The two are aided in their adventures by a large mechanical dog Yatterwan. Unlike previous series in the Time Bokan franchise, Yatterman does not cover any specific time/space travel. Instead, the places where the hero travel to and the individuals they encounter are either a homage or parody. The fictional characters or places are usually represented by purposely misspelled names or familiar actions. For example, a revolution leader is named "Yashington" as a homage to George Washington; and a place resembling ancient Japan is named "Yametai" ((I) want to stop), as a spoof of Yamatai.

メカ造りが好きな少年ガンちゃんとガールフレンドのアイちゃんは、犬型メカ・ヤッターワンを完成させ、世のため人のために正義の味方ヤッターマンになることを決意する。一方、悪玉トリオのドロンボー一味の下へ、泥棒の神様ドクロベエが現われる。ドクロベエは世界中に散らばっている、大金塊の在り処を記した８つの石・ドクロストーンを集めて欲しいという。ヤッターマンはドロンボー一味の悪行を阻止するため、ヤッターワンと共に出動する。