That's what everyone says. I have checked both the theme file, and both the bgm file, but neither of those contain this particular music. fyi, I dumped the sounds from the theme with YATAplus, and I played the bgm in EveryFileExplorer.
I may try the new ram site, and download more RAM to my Switch. Not sure if ddr3 is the right ram
for it tho. Edit- no it uses floppy Ram, just like @AncientBoi