Either it's Team Magma or Team Aqua. It depends on the version of the game. Anyway, this theme is groovy. Best used for modern looking levels. I guess it can work for castles too since this theme is originally heard when inside the antagonist's hideout.
UPDATES: Swapped a few channels around. Fixed the @21s randomly changing pitch. Tacked on $F4 $02 to make this sound way better than the previous 2 versions. Fixed the @3 that played on channel 8, which was an entire octave lower than intended.
Ive been noticing how you've been setting up your $f4 $02 commands, pretty cool how you toggle it off upon loop on songs without intros and make sure nothing plays even when inside a loop, be careful tho as in this song #1 and #2 still have stuff playing.