Wind

Wind is a mechanic that appears as an obstacle in the Super Smash Bros. series. Wind cannot hurt fighters, although it can blow them into an enemy or hazard or down a pit.

Super Smash Bros.
In Super Smash Bros., wind appears on the Dream Land stage. Here, a tree named Whispy Woods blows wind at fighters in an attempt to blow them off the stage.

Super Smash Bros. Melee
In Super Smash Bros. Melee, wind appears on the Green Greens stage. Here, Whispy Woods blows wind either left or right, attempting to blow fighters off of the stage as he did in Super Smash Bros.

Super Smash Bros. Brawl
In Super Smash Bros. Brawl, wind appears on some levels in The Subspace Emissary, such as The Wilds, The Swamp, The Battleship Halberd Exterior and The Glacial Peak. It blows like normal wind to the side, but it also blows upward in the swamp. The Subspace Emissary also has a type of enemy, Borboras, who can blow wind at fighters. The stage Pokémon Stadium 2 will sometimes blow wind upwards, causing it to take longer to get down. The PictoChat stage also features drawn wind blown to the left. Since Green Greens returns from Super Smash Bros. Melee, so does the wind on the stage. Ridley can produce wind from his wings during his boss fight.

Super Smash Bros. for Nintendo 3DS / Wii U
In Super Smash Bros. for Nintendo 3DS, wind occurs in the Paper Mario stage when the Fan appears, blowing fighters to the right, and wind can also occur in PictoChat 2. In the returning downloadable Dream Land stage for both games, Whispy Woods once again attempts to blow fighters off the stage.

Super Smash Bros. Ultimate
In Super Smash Bros. Ultimate, certain spirit battles (e.g. Fox Luigi) have wind blowing either periodically or constantly. Some spirits can make a fighter partly or completely immune to wind.