In MM 3 password cequence, I've never quite really been able to fuigure out if they're serious or not. I mean, at first it's all Vaudeville like, Dum-dum- Dyum dum- dumdi di- dum- dum -dee- de-- dum- de -dum- dum... Then it's like "SELECT YOUR ENEMY".
http://www.vgmusic.com/music/console/n intendo/nes/MM3Pass.mid
http://www.vgmusic.com/music/console/n intendo/nes/mm3select.mid