Time Bokan Series: Yatterman(1977)

Original title: タイムボカンシリーズ ヤッターマン

The Yatterman duo and an evil trio led by the beautiful Florina engage in a struggle to obtain the Skull Stone—which is said to reveal the location of a gold mine. The trio seem to constantly have the upper hand, but are always foiled by Yatterman, who are able to stop their evil schemes.