Fourside

Fourside is a location is an unlockable stage in Super Smash Bros. Melee and a starter stage in Super Smash Bros. Ultimate. It resembles a combination of Fourside from the EarthBound series and Moonside.

The stage is set high on the skyscrapers of Fourside. Players have to be careful not to fall into the gaps between the buildings. There is a crane on the left side carrying a wooden board. The board is occasionally moved over the gap on the side, allowing fighters to battle on top of the gap.

A UFO randomly appears on the leftmost or rightmost side of Fourside, and fighters can use it as a platform. However, the surface of the UFO is very slippery, and players have a hard time using their characters on the platform. After a prolonged period of time, the UFO disappears, presumably because of a teleportation device. After a while, the UFO returns to the stage.

In Super Smash Bros. Melee, Fourside can be unlocked by playing 100 matches in VS mode. It is also featured in two Event Matches: Lv. 25: Gargantuans and the first part of Lv. 36: Space Travelers.