I found a playlist of 36 soundtracks (I'm pretty sure there's more :p) of this game here.

I converted 16 of them to MP3s. I've never downloaded that many (good) soundtracks from a single game ever. :')

I'm still trying to find that theme playing in the 2nd trailer (I think it's also the World 4 boss?) though.

I love the Athletic, Beat Block Skyway, Castle, Ghost House, Hands-On Hall, Puffprod Peaks, Credits, World 3 and World 6 themes so much... ^__^