This is the cartridge for Tails & The Music Maker. This is a sort of semi-educational game released for the Sega Pico. The Pico was made especially for little kids to play though it didn't catch on very well and did not last that long. Most of the games for it were semi educational. This particular game features mostly just Tails and helps you to learn scales, tempo, rhythm, and about instruments. It also has mini games inside like coloring and making your own music with it. As you can see via the mis-colored sort of poor stock art they chose, it was released in the USA first, and Japan later.