All-Star Rest Area

The Teletransportation Room is used to warp between battles in Adventure throughout all of the Super Smash Bros. games, includuing SSF.

In Super Smash Flash
A stage using the same sprites as Floating Islands

In Super Smash Bros. Melee
It appeared as a large outdoor/park area.

In Super Smash Bros. Brawl
It appeared as a large enclosed cave with a hole in the roof for light.