Water is an attack effect in the Super Smash Bros. series that encompasses water-based attacks. The water type and water effect are entirely separate: for example, a move can be Weapon-type with a Water effect, Water-type with a Battering effect, or even Water-type with a Water effect. Targets hit by Water attacks will flash blue and emit a small shockwave surrounded by water droplets.
Moves with a water effect are affected by type effectiveness in Super Smash Bros. Brawl; that is, they deal 1.1x knockback to Charizard and 0.9x knockback to Ivysaur. Additionally, Blue Pikmin are immune to attacks with a water effect. Like all effects, enemies and bosses in Brawl's The Subspace Emissary each have their own damage multiplier for moves with a water effect.
Water attacks are affected by the Primary Spirit skill Water Attack ↑ and the Support Spirit trait Water & Ice Attack ↑ as well as certain Spirit Battle conditions in Super Smash Bros. Ultimate. In Super Smash Bros. Ultimate, water attacks are resisted by the Spirit skill or trait Water/Freezing Resist ↑ and deal more damage to fighters equipped with a Primary Spirit with the trait Water Weakness.
Out of all the effects in Brawl, water is one of the most useful in the Subspace Emissary—it deals extra damage to fire-based enemies, some mechanical enemies (particularly the R.O.B. Squad), and about half of the bosses.
List of water-effect attacks