Meloetta's Musical Mess was an area in The Fourth Dimension. It has many giant instruments levitating in mid-air. It has a several enemies, and has a collection of stars. It is the home to 4D Meloetta and the Naughty Notes. Mario and his friends stopped the Naughty Notes from turning it into a bad state.
- On a platform reached by being on a Thorromp: Collected by Enzo
- Use Flute cannon to enter Tuba Slide: Collected by legowoo101
- Inside a spinning tambouringe: Collected by hermeslao
- Staff River Jumping: Collected by HylianTimeTraveler
- 100 coins: Collected by TristanBomber
- 8 red coins: Collected by MrMmarioLuigi
- Wing Cap D-Star: Attempted by terminario8000, but had to wait until Wing Cap Switch was pressed