Pac-Man demonstrates invincibility due to the Super Star.

Invincibility is a state where a hurtbox cannot be attacked or damaged. Attacks will hit (so the attacker takes hitlag), but will not deal damage, knockback, or hitstun. Characters who are invincible can still be affected by certain windboxes, as well as Master Giant's grab attack in Smash 4.

Invincibility's negative aspect is that on the Planet Zebes, Brinstar, and Norfair stages, characters will fall straight through the stage's lower hazard, rather than sustaining damage and bouncing back up. They may occasionally also be KO'd if they are standing on the track on Port Town Aero Dive, and both the Melee Mute City and the Smash 3DS Mute City.

In Super Smash Bros. Melee's debug menu, invincibility is displayed by affected hurtboxes changing from their usual yellow color to a green color during the invincibility period. A similar feature is present in Super Smash Bros. Ultimate's Training Mode via an invincibility toggle, which causes invincible parts of characters to acquire a green tint.

In Super Smash Bros. Brawl, it is actually possible to hit an opponent normally out of invincibility. If an attack connects while the opponent is invincible and then the invincibility ends while the attacker is still in hitlag, the attack will actually hit the opponent when they become vulnerable due to the hitlag extending the duration of the hitbox. This is only the case in Brawl however as in every other game, the attack will not connect against the opponent once they become vulnerable.

Invincibility should not be confused with intangibility or armor. During invincibility, all knockback and damage is canceled when the character is hit. In regards to intangibility, however, the character cannot be affected by either knockback or damage in the first place. Armor has characters sustain damage, but not knockback.

List

 
  • Smash attacks in this table are not charged.
  • All attacks from Smash 4 and Ultimate display invincibility values as of their latest updates.
User/Item Move Part of Character Invincibility Frames Notes
By Characters
All characters Throws Entire body Varies  
1-8  
1-18 
* Invincibility lasts until the opponent is thrown
Respawn 120       *Commences the moment the character dismounts from the Revival Platform
** The amount of invincibility frames decreases the longer it takes to dismount from the Revival Platform
Banjo & Kazooie Wonderwing Entire body 18-53   *Vulnerable to grabs
Bowser Back aerial Shell 3-15 
Forward smash Feet 20-25  
Up smash Shell 14-27   
Fox Fire Fox Entire body 29-42  *Only grants invincibility in the NTSC-J version
Hero Forward tilt Left arm and leg 9-11  *Grants invincibility on just the left arm for frames 10-11
Kaclang Entire body 15-314  *Only vulnerable to another Hero using Metal Slash
Ice Climbers Belay Partner 16-33 
Ike Counter Entire body 11-16 (startup), 1-6 (counterattack) 
9-16 (startup); 1-5 (counterattack) 
Incineroar Darkest Lariat Entire body 5-57  *Applies invincibility to:
**Entire body on frames 5-6
**Head and arms on frame 7
**Arms on frames 8-57
Lucas Up smash Entire body 1-4  
1-7 
Luigi Luigi Cyclone Entire body 4-8 (ground), 1-7 (midair) 
Mii Brawler Flashing Mach Punch Entire body 11-66  *Only if the attack lands
Mr. Game & Watch Up smash Head, arm, and foot 
Entire body 
4-25 
21-25 
* The arm and foot which are intangible depends on the direction Mr. Game & Watch is facing.
Ness PK Thunder Entire body 1-9 
1-17 (NTSC-J)
*Applies to PK Thunder 2 only
Palutena Dash attack Upper body 4-15 
5-16 
* After frame 6, invincibility applies to her left arm
Back aerial 3-10 
7-10 
* After frame 7, invincibility applies to her left arm
Ridley Skewer Entire body 4-47  *When sweetspotted
R.O.B. Diffusion Beam Entire body 1~   *Lasts while the beam is active
Rosalina & Luma Luma Shot Luma 4-20   *Only when fully charged
Samus Screw Attack Entire body 1-5 (ground) 
1-11 (NTSC-J ground) 
1-3 (midair) 
Snake Covering Fire Entire body 1~  *Lasts until Snake gets up from his kneeling posture
Sonic Super Sonic Entire body 1~   *Lasts for the entire duration
Squirtle Withdraw Entire body 20~ 
22~ 
*Unlike other instances of invincibility, instead of collision "bubbles" appearing when an attack lands and a blunt sound effect being heard, one can both hear and see the attack's visual effects as if there were no invincibility frames at all
Yoshi Shield Entire body 1-3 (activation) 
1-6 (activation) 
*  Starting from frame 3, Yoshi is considered to be in shield so he will shield attacks from this point onwards.
By Items
Dragoon Entire body 1-119    *After the attack, while descending back to the stage
Golden Hammer Entire body 1    *Also affects the opponent
*Lasts until hitstun ends
Hammer
Super Star Entire body 1-600       *
By Pokémon
Ditto Varies Varies  *When performing any move or action that grants invincibility
By Stage Element
Mushroom Kingdom (SSB) (Warp Pipes) Entire body 1-49  *When emerging from a pipe
PictoChat 2 (Pipes) Entire body 1-51  *When emerging from a pipe

Trivia

  • If the Shadow Assist Trophy freezes a character while invincible, the character will remain invincible until being unfrozen. This offer some niche competitive strategies where an affected character can achieve invincibility before being frozen and get several seconds where they are unable to receive damage.