Ojarumaru - Mangan Jinja no Ennichi de Ojaru! is a Game Boy Color title released exclusively in Japan. Based on the name, it is likely a game based on the Ojarumaru franchise, probably incorporating elements of Japanese culture and storytelling.  Without detailed information on its gameplay and publisher, a more complete introduction is not possible.

Ojarumaru - Mangan Jinja no Ennichi de Ojaru! (Japan)

Ohasuta Dance Dance Revolution GB (Japan)