This was one of the covers I submitted for Famicompo Mini Vol. 8. I placed 4th in the covers section (and another two covers were submitted along with it). I am going to do some updates to the other two covers before I put them up onto YouTube.
This one is an RP2A03 only cover of both Sky Station Galaxy and the Super Mario Galaxy 2 Theme, after the second loop of Sky Station Galaxy, it transitions into the second half of the Super Mario Galaxy 2 Theme and eventually loops back to Sky Station Galaxy. Unfortunately when I submit the timings for Famicompo I incorrectly specified a shorter time for this song, so if you grabbed the MP3 renders before you will have missed the ending!