Side special move
The side special move (also commonly called forward B, side B, smash B, or over B) is a special attack performed by pressing the special move button with the control stick held left or right.
Not counting Final Smashes, the side special is the only special attack to originate in a game other than the original Super Smash Bros. - namely, in Super Smash Bros. Melee. In the original, pressing the special button with the stick held sideways would result in a neutral special move. With the introduction of side specials in Melee, some characters' neutral specials were changed to be side specials, with a new neutral special taking their place.
Many side specials involve either significant sideways character movement or a projectile that has a better horizontal range than the user's other projectiles. As a result, many can be utilized as approaches, while those that grant a movement boost tend to be a fighter's horizontal recovery move.
Smash special move
Some side special moves are different depending on whether or not the control stick (or pad) is tapped/"smashed" or simply tilted to the side. The side special moves affected by this are:
Reverse side special move
In Brawl, SSB4 and Ultimate, most side special moves can be reversed in the first few frames, although the usefulness is questionable since any character can quickly turn around on the spot and immediately perform their side special move. The only true use for a reverse side special is while running; when running, the player cannot use their side special backward without having to stop or turn around first. The reverse side special can be done while running and gives certain characters boosts when turning around, the most notable boosts being Donkey Kong's and Luigi's reverse side specials, where the former gets a quick boost backward and has an unsurprising hit, and the latter will keep sliding forward while being able to charge his move.
List of side special moves
List of custom side special moves