Something sort of minor, but interesting I discovered.

[TheUltimateKoopa]

You know Wario Land: Super Mario Land 3?
Well I discovered that if you leave the results playing (when you complete a level and it adds your coins up), after 4 minutes and 46 seconds, the noise channel completely stops.

I might upload a video soon for proof. Or you can just try for yourself if you have the game on the 3DS, or even the original game.

I discovered this by using something which converts GBS (Game Boy Sound) files to GSF (Game Boy Advance Sound) files, and then another program which basically finds when the file loops. The other things like the Boss Battle had normal loops like 29 seconds, or whatever, but then this one came out at 4:46 so I decided to see why it was so long and well there you go.

I also tried it on Donkey Kong Land 3, and some how, there's a track that loops after 5 minutes and 3 seconds (specifically 05:02.874)

I'll tell you what it is, and how it worked it out at that length, when I find out.

So it turns out that was the File Select music but somehow I don't see any secret tunes or things like the SML3 one.