Re-releases
In 1993, Nintendo released an enhanced SNES compilation titled Super Mario All-Stars. It included all of the Super Mario Bros. games released for the Nintendo Entertainment System and Family Computer. The version of Super Mario Bros. 2 included in the compilation had improved graphics and sound to match the SNES's 16-bit capabilities, as well as minor alterations in some collision mechanics. Among other enhancements, it was also possible to change the character after losing a single life, while the original version allowed to change it only after completing a level or when the player lost all its lives and chose "Continue", making the game much more forgiving when choosing a character not adept at some specific level. Also, the player began with 5 lives instead of 3, and the slot game gained an additional character: if one could get three "7"'s, the player could win ten lives.
In March–April 1996, Nintendo (in collaboration with the St.GIGA satellite radio station) released an ura- or gaiden-version of the game for the Satellaview system featuring graphical enhancements similar to Super Mario All-Stars. This new game was entitled BS Super Mario USA Power Challenge (ＢＳスーパーマリオＵＳＡ パワーチャレンジ?), and like all Satellaview titles it was released episodically in a number of weekly volumes. BS Super Mario USA Power Challenge was never released outside of Japan and as with all other Satellaview titles it has never been re-released as a stand-alone title. The game exists today solely in ROM-format and is traded online by Satellaview emulation enthusiasts.
Read more about this topic: Super Mario Bros. 2