Fourside
From Mariopedia, a wiki on Mario, Yoshi, Wario, Donkey Kong, Super Smash Bros., and more!
Fourside Is a place in the earthbound series. However, it also appears as an unlockable stage in the video game Super Smash Bros. Melee. It had a giant U.F.O that would occasionally show up on screen, and players could jump on top of the U.F.O.