Storm Drain

Not in Pokémon ChampionsGen IV

Game

Scarlet & Violet

This Pokémon draws Water moves to itself to raise Sp. Atk by 1; Water immunity.

Who has it: 8 Pokémon
Showdown rating

How it works in Gen IX

This Pokémon is to Water-type moves and its Special Attack by 1 when hit by a Water-type move. If this Pokémon is not the target of a single-target Water-type move used by another Pokémon, this Pokémon that move to itself if it is within the range of that move. If multiple Pokémon could redirect with this Ability, it goes to the one with the highest Speed, or in the case of a tie to the one that has had this Ability active longer.

“The Pokémon draws in all Water-type moves. Instead of taking damage from them, its Sp. Atk stat is boosted.”
In-game text, Scarlet & Violet

Changes over time

How Storm Drain changed from game to game, newest first.

Gen V
added: This Pokémon is immune to Water-type moves and raises its Special Attack by 1 stage when hit by a Water-type move. If this Pokémon is not the … this Pokémon redirects that move to ~~dropped: itself.~~ added: itself if it is within the range of that move. If multiple Pokémon could redirect with this Ability, it goes to the one with the highest Speed, or in the case of a tie to the one that has had this Ability active longer.

Descriptions: Pokémon Showdown’s for each generation, and PokéAPI’s notes on the changes they don’t show. Champions: Pokémon Showdown.