Unblockable attack

An unblockable attack (also called unblockable move or unblockable) is an attack that cannot be defended against with a shield or a counterattack. Unblockable attacks tend to be exceptionally powerful and are often grabs, Final Smashes, wielded by bosses, or moves from rare Pokémon and Assist Trophies; there are very few moves that are unblockable outside of these cases. In Brawl, SSB4, and Ultimate, most characters have at least one unblockable attack if grabs and Final Smashes are counted.

Unblockable attacks can still be avoided by intangibility, such as sidestepping and air dodging, as well as 's Witch Time in most cases. True invincibility also protects against unblockable attacks, such as that granted by a Super Star.

It is possible for a shielding character to be hit by a blockable attack and an unblockable attack on the same frame. What happens in this situation depends on the game.
 * In Melee, the blockable attack hits the shield, and the shielder is hit by the unblockable attack.
 * In Brawl and SSB4, the blockable attack hits the shield and the shielder goes into shieldstun. The unblockable attack hits the shielder, but it deals no damage or knockback.

All grabs (with the exception of 's Fishing Rod, 's grounded Grappling Hook, 's Buster Wolf and 's Sword of the Creator) are unblockable and so will not be included in the following list.

List of unblockable attacks by characters
Moves only available as custom moves are indicated in italics.

List of unblockable Final Smashes
Note that, in Ultimate, all Final Smashes are unblockable, so this table only applies to Brawl and Smash 4.