From the Super Mario Wiki
Gerudo Valley is a stage appearing in Super Smash Bros. for Nintendo 3DS and Super Smash Bros. Ultimate. It is based on the location of the same name in The Legend of Zelda: Ocarina of Time, while the graphical style is specifically based on Ocarina of Time 3D.
The stage is set in the valley itself, on the bridge dividing the Gerudo Fortress from Hyrule Field. Two platforms appear on the land on both sides of the chasm. The bridge can be destroyed with enough attacks, causing fighters on it to fall down the chasm; beneath the bridge is a pair of platforms on both sides of land, and underneath those platforms are spikes. After a while, the Song of Time plays, and the bridge repairs itself.
Koume and Kotake will appear whenever the bridge is broken, and one of them will cast a spell that changes the environment on one side of the stage. Kotake casts an ice spell that covers the right side of the stage in spikes of ice, freezing any players on contact, while Koume casts a fire spell that covers the left side of the stage in flames that deal damage and knockback.
The Final Destination version of the stage is set on a platform with the valley in the background.
The unlock match for Ganondorf takes place here.
Names in other languages