This is a game version of the jungle king Tar-chan, which was also made into an anime at the time. It is an action game where you control Tar-chan and fight to protect the peace of the jungle. You can use the animal power by saving the animal that was caught. Animal powers can only be used in side view stages. There are various abilities, such as increase your jumping power and walk upside down on the ceiling.
Characteristically, this animal power is divided into a serious type and a gag type, and the thing that can be used changes depending on whether Tar-chan is in a serious state or a gag state. By the way, by using items, you can switch between Serious and Gag status.