Slash is an attack effect in the Super Smash Bros. series that debuted in Super Smash Bros.. The slash effect generates a slash visual effect: a white and blue circular slash in Super Smash Bros. and Super Smash Bros. Melee, and a crescent-shaped visual effect from Super Smash Bros. Brawl onward.
Slash attacks are boosted by Slash Attack stickers in Super Smash Bros. Brawl's The Subspace Emissary and certain Spirit Battle conditions in Super Smash Bros. Ultimate. Additionally, they are resisted by Slash Resistance stickers in The Subspace Emissary.
Stab is an attack effect in the Super Smash Bros. series that debuted in Super Smash Bros. 4. The stab effect generates a stabbing visual effect, a staight line in the direct of the attack (as opposed to a crescent like is produced by slash attacks).
While sound effects are not tied to attack effects, there are several different slashing sounds effects that are often used by attacks with a slash effect; there are two slashing sound effects in Super Smash Bros., Melee Super Smash Bros. 4 and Super Smash Bros. Ultimate each have three, while Brawl has one sound played at differing speeds and pitches (e.g. Link's down aerial has a low pitch, whereas Bowser's neutral attack has a medium pitch). However, because sound effects and attack effects are separate, many slashing moves use other sound effects; for example, Fox's clean up smash in Brawl, SSB4 and Ultimate uses a kicking sound effect, while Roy's non-sweetspotted sword moves use punching sound effects.
In Melee and Ultimate, two slash attacks that collide will produce a clanging sound effect reminiscent of metallic noises akin to swords clashing.
In Brawl, SSB4 and Ultimate, there is a set of slash-based sound effects that are noticeably slower and deeper pitched than regular slash sounds. In Brawl, these were reserved for Ike because of Ragnell's status as a heavy broadsword. In SSB4, these sound effects, which have been altered, are also used as part of Pair Up, Shulk's Back Slash if he hits an opponent's back with the move, and Dunban's attacks during Chain Attack. In Ultimate, these sounds also play for Marth and Roy's sweetspotted sword attacks, alongside all of Chrom's sword attacks.
List of slash attacks
By enemies and bosses
By stage hazards
List of stab attacks