MIPS' Theme

MIPS' Theme is a melody heard when a player catches a rabbit in Super Mario 64 DS. The difference between "MIPS' Theme" and "Rabbit's Theme" is that none of the rabbits in Super Mario 64 DS are called MIPS, and there isn't multiple rabbits in the original Super Mario 64.

Super Mario 64 Manifestation
In some personalized copies of Super Mario 64, the melody can be heard if a player catches MIPS in the Castle's Basement.

Name differences
The name given in the original Super Mario 64 game, is called MIPS' theme because none of the yellow rabbits are called MIPS in Super Mario 64 DS.

Theories
The theme is thought to be a leftover place holder from the game, or it was created by the Personalisation AI.