because it's the official anthem of the Statehood of DDD and the composer of it was born there. Jolly Roger Bay's military police regime has been said to have plagiarized it and blasts it out of cheap loudspeakers. You ever wonder why the audio quality seems so bad when you're swimming around there?
Super Mario Boards
Doctor Bowser
Ray Trace
I think it's because the official soundtrack that was released called it that.