Paralyze is an attack effect in the Super Smash Bros. series that debuted in Super Smash Bros. Brawl and has appeared in every subsequent game. Fighters hit by paralyze attacks are inflicted with the paralysis status condition for an amount of time based on the attack's knockback. While paralyze attacks typically do minimal damage and knockback, they freeze their victims on the spot momentarily, granting an opening for a fighter to followup with a combo or a powerful move. This makes them strong utility moves for fighters who have access to them.
Outside of Final Smashes and custom moves, Zero Suit Samus's Paralyzer and down smash, Corrin's Dragon Fang Shot, and the bell from Pac-Man's Bonus Fruit are the only fighter attacks with the paralyze effect. Additionally, several Assist Trophies and Poké Ball Pokémon, stage hazards, and Smash Run enemies have the paralyze effect.
Paralyzed fighters freeze in place while shaking back and forth briefly, before taking the knockback of the attack.
Any fighter hit by a paralyzing attack will be inflicted with paralysis. In Brawl and Smash 4, if a fighter that was paralyzed is hit by a paralyzing attack again before they land, grab a ledge, or can act out of the effect will only cause damage to them with no knockback or paralysis; in Ultimate, the fighter takes knockback alongside the damage, merely without being paralyzed, allowing such moves to still function as traditional launchers until that fighter can be paralyzed again.
The duration of paralysis in frames is
List of paralyzing attacks
By enemies and bosses
By stage hazards
In addition to natural stage hazards, the Spirit Battle condition "The floor is electrified" creates a hazard that inflicts paralyzing damage.