VGFacts

The Music for Super Smash Bros. Melee's Rest Area is the theme for The Great Cave Offensive's Save Area in Kirby Superstar.

Proof
Melee: http://www.youtube.com/watch?v=eB7j0RxJ1kU
Kirby: https://www.youtube.com/watch?v=WBJo5olbeUk

Makes since. They were both made by HAL.

I think this was also in Kirby Super Star.

It was also the Save area music for the Great Cave Offensive in Kirby Super Star.
http://youtube.com/watch?v=XH-i4dNl3Bg