Yuu Yuu Ki

Yuu Yuu Ki is a game released only in Japan for the Famicom (NES). It's an adventure game staring Goku, a monkey king who was destined to travel west. On his adventure, he meets up with multiple different, distinctive characters, none of which are members of the same species. The English translation for the game is Brave Brave Spirit. In all, there are two discs, with the second one being released a month after the first.

As of yet, the game has never seen a stateside release, and presumably never will.