Time Bokan Series: Zenderman

A scientist named Dr. Monja seeks to uncover the truth behind the Elixir of Life, a substance said to grant immortality and eternal youth. To aid his research, he creates a machine known as the "Time Tunnel," which sends a group of young individuals on a journey through time and space in search of answers. At the same time, a group of three antagonists appears to be pursuing the same objective.