I really don't know what to say, here. Simply for including such a song as Marx's theme deserves a nine at least, but so many of the other tracks are outstanding as well... The game was thoroughly entertaining, but the music is just something else. Marx's theme, "The great blue sky and the stars above", and all the Revenge of Meta Knight tracks blow me away. The instrumentation is lacking, and while I docked a point in Hoshi no Kirby 64 for their overuse of synth, I just look straight past that with this one. Super Star is outstanding, and there is nothing that I can think of that could possibly mar its fantastic music.
That, and the recognition Super Star was given in SSBB was nice, too. Having an 'official' remix of Marx and Meta Knight was nice.