The music from the Yoshi's Island map screen has been my ringtone for years.
http://www.youtube.com/watch?v=ibSFwlG1EjQ
Luigi's Mansion 2 - well... the ringtone
Battletoads - Pause Menu
RULES OF NATURE
As did I.Came to post this.
And of course, the song I've always wanted to hear it remixed with before I die (Hell's Gate Open - MMZ3) would make some great ringtones too:
http://www.youtube.com/watch?v=0TCWU6NjPLQ
I have Navi's "Hey, Listen!" as my text tone
Not a ringtone, but my phone's morning alarm is the victory theme from Persona 4, Period.