Shield damage

Shield damage is an effect that certain attacks in the  games have. All hitboxes have a shield damage value, which will additively change the damage dealt to shields. For most attacks, this value is set as 0, however, for some attacks, this value can be either a positive or negative number, adding or subtracting from the damage the attack deals to shields. For example, Donkey Kong's Headbutt will do more damage to an opponent's shield than his forward smash since its hitbox has high shield damage, despite his forward smash having higher base damage. The Fan and Marth's Shield Breaker are the most well-known examples of attacks that do significant shield damage. Quite a few attacks deal extra shield damage, but most such attacks do not have a high value for it.

Some attacks have the opposite effect: they have negative shield damage, dealing less damage to shields than to characters. This concept was used for a few moves in the original SSB, but removed for all except the Home-Run Bat in Melee, and no known attacks use it in Brawl or SSB4. Ultimate reintroduces the concept as a significantly more widespread mechanic, particularly for projectiles after update version 3.0.0.

Bonus shield damage is generally fixed; it is not increased by charging a smash attack, nor does it decrease when an attack is stale.

Attacks listed below contain attacks with shield damage. Unless stated otherwise, the entire attack has the effect.

List of shield damage attacks in Smash 64
* Copy abilities not mentioned are the same as their originals.

List of shield damage attacks in Melee
* Yoshi's and Pikachu's edge attacks do not have extra shield damage.

** Copy abilities not mentioned are the same as their originals.

*** It is currently unclear which containers match which shield damage values.

**** Boss and stage hitbox details are not 100% confirmed accurate.

List of shield damage attacks in Brawl
* Yoshi's edge attacks do not do shield damage.

** Despite dealing shield damage, Peach Bomber can not activate on shields, rendering the shield damage meaningless.

List of shield damage attacks in Smash 4
Note that all shield damage, as with normal damage, is multiplied by 1.19 when connecting with a shield.

* Bowser Jr.'s back floor attack and all of Sonic's floor attacks deal 10.

** A fully charged Focus Attack is unblockable, making the shield damage inapplicable.

List of shield damage attacks in Ultimate
* Bowser Jr.'s back floor attack and all of Sonic's floor attacks deal 10.