Smash 3DS How do you use the 3rd and 4th stage music tracks?

[Zungryware]

I know that if you hold R while selecting a stage, it will play the 2nd music track. Though certain stages like wily castle and mii plaza have 3 or even 4 tracks that you can find in the vault. Airman stage is awesome and i find it hard to believe they would put these tracks in the game without any way to actually use them. And I didnt know these tracks existed until I found them in the vault. Does anyone know?

 

[AreJay25]

You cannot play those songs on the stages. They are meant for Smash Run only.

 

[Mario & Sonic Guy]

Certain tracks are only playable in Smash Run. Each stage only has two BGM choices, but you can't control if you want the main BGM to play; the second BGM will always play if you hold the R button before choosing a stage.