Nintendo Never produced this game, This game is a rare piece.

it's really a Japanese game Mario (Baby) 2, 1988
a pirated Japanese game, never sold in America or anywhere else in the world,
this game is an unofficial pirate copy published in 1988, the game of plateform
 , the real name of this game will be * * Bio Miracle Bokutte **, 
later known on NIntendo 1993: ** 
is a video game of Konami, launched for the first time on the Japanese market in 1988 for the system Famicom Disk. It was reissued as a game cartridge in 1993 for Famicom. (Nintendo)
currently, sales of this game sold to the world are minimal for the pirated version. 
This game is a rare piece.
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Who would ever have thought of playing a baby character in a platform game? Well,
 I've never done it. Konami decided to create a bay with a magic stick 
to hit and inflate all these horrible enemies. This game is fun and with cute music

Bio Miracle Boss is one of the most successful bosses in the world. 
The graphics are colorful and well detailed.
 The levels are fun and can sometimes be frustrating but difficult.
 The coordination of jumps is a must in this game.

This is a solid game and something different for the genre platform. 
If you are a fan of the 8-bit platform, 
you can have fun and enjoy the dark efforts of Konami.