Wind is an aesthetic and physical element that is used for stages in all five Super Smash Bros. games. As a physical element, wind can move both characters and items. Outside of this, some stages can have wind as a purely aesthetic element, with various elements of characters moving in response to the wind, such as Link's cap.
Wind is also present in some stages of the Subspace Emissary. Headwinds make it more difficult to progress through a stage, as characters will be pushed backwards, while tailwinds force the character to progress much faster, but requires faster reactions. It's also present in the subsequent game's Smash Run in a similar vein, however, the wind will constantly change directions in random directions for a set amount of time. Wind can also appear within Spirit Battles in World of Light, of which some Spirits will reduce or eliminate the wind's impact.
Stages that include winds are: