Yume Kōjō: Doki Doki Panic

Doki Doki Panic is a Japan only game that is based on a family who plans to save two children. The game was later remade and brought to USA as Super Mario Bros. 2, which was rereleased later on in Japan as Super Mario USA. The game is most notible for featuring multiple additions to the Nintendo universe. One being that it was the first game to feature Birdo, and second, that it featured 4 characters, which was unusual for the time.