Yume Koujou: Doki Doki Panic (Famicom Disk System)

Yume Koujou: Doki Doki Panic is an Action game, developed by Nintendo and published by Fuji Television, which was released in Japan in 1987.

It was later released outside of Japan in an altered format under the name Super Mario Bros. 2, since the original Japanese Super Mario Bros. sequel, Super Mario Bros.: The Lost Levels, was deemed too similar to the original and too difficult for overseas players. Eventually, the altered Mario version of Doki Doki Panic was released in Japan as well, under the title Super Mario USA.