Rapid

The first four hits of Luigi's dash attack use the rapid effect.

The rapid effect (known internally as rush) is used by a small amount of attacks in Super Smash Bros. Ultimate. They are exclusively used for certain attacks that strike quickly and repeatedly. The effect does not appear to function any differently from the Normal effect, and is likely only cosmetic.

List of attacks with rapid hitboxes

Character	Move(s)
Bayonetta	Rapid jab
	Witch Twist
Bowser Jr.	Rapid jab
Captain Falcon	Rapid jab
Charizard	Fly
Daisy	Down aerial
Dark Samus	Up aerial
	Screw Attack
Donkey Kong	Spinning Kong
Dr. Mario	Dr. Tornado
Fox	Rapid jab
	Forward aerial
	Down aerial
Greninja	Up aerial
Ice Climbers	Up tilt
Isabelle	Lloid Trap (Lloid)
Ivysaur	Rapid jab
Jigglypuff	Down aerial
King Dedede	Rapid jab
	Side tilt
	Up aerial
Kirby	Rapid jab
	Down aerial
	Down throw
Little Mac	Rapid jab
	Rising Uppercut
Luigi	Dash attack
	Luigi Cyclone
Mario	Down aerial
Meta Knight	Down throw
Mii Brawler	Rapid jab
	Onslaught
	Helicopter Kick
	Thrust Uppercut
Mii Gunner	Forward smash
	Up aerial
Min Min	Rapid jab
Mr. Game & Watch	Rapid jab
	Neutral air
Olimar	Up tilt
	Neutral aerial
Pac-Man	Down aerial
Palutena	Up tilt
	Neutral aerial
	Up aerial
Peach	Down aerial
Pikachu	Back aerial
R.O.B.	Down smash
	Up aerial
	Arm Rotor
Rosalina & Luma	Rapid jab (Luma)
Samus	Up aerial
	Screw Attack
Sheik	Sheikah Dance
Sonic	Up smash
	Forward aerial
	Down throw
Wario	Down aerial
	Corkscrew (while rising)
Wolf	Fire Wolf
Yoshi	Down aerial
Zero Suit Samus	Boost Kick

Trivia

• When an opponent is sent into tumbling by a rapid attack, the launch smoke trail doesn't appear for unknown reasons.