Super Mario 64 Level select sound similar to Super Mario Bros. overworld theme

[MeleeWaluigi]

I mean, that's pretty much the theme of the series in general(every time someone hears that music, they think of Mario) and it has been remixed countless times in different games, so it's not that suprising.

 Just to put a example: the menu theme of the same game(mario 64) is a complete remix of the song

Now that you said that Nintendo does remix their music in general (not counting Super Smash Bros. games). I've heard quite a few reused or remixed music in a few games.