All-Star Rest Area

The All-Star Rest Area is a special stage used to warp between battles in All-Star mode throughout all of the Super Smash Bros. games and in Super Smash Flash.

In Super Smash Flash
A stage very similar to Floating Islands. Players can KO themselves here without losing, but they will respawn next to the door and their damage is kept. If the player goes through the door while healing, the healing will stop and the next battle will start.

In Super Smash Flash 2
All-Star mode currently remains unconfirmed for Super Smash Flash 2, and thus, how the Rest Area looks is also unknown.

Origin
The concept of a resting area between fights with optional healing items comes from Kirby Super Star, with both The Great Cave Offensive and The Arena sub-games as possible inspirations.