White Smoke

In Pokémon ChampionsGen III

Game

Pokémon Champions

Prevents other Pokémon from lowering this Pokémon's stat stages.

Who has it: 4 Pokémon
Showdown rating

How it works in Champions

This Pokémon cannot have its stats lowered by other Pokémon.

This ability does not prevent any stat losses other than stat modifiers, such as the Speed cut from ; nor self-inflicted stat , such as the Special Attack drop from Overheat; nor opponent-triggered stat , such as the Attack boost from Swagger. This Pokémon can still be passed negative stat modifiers through Guard Swap, Heart Swap, or Power Swap.

This ability functions identically to Clear Body in battle.

Overworld: If the lead Pokémon has this ability, the wild encounter rate is halved.

“The Pokémon is protected by its white smoke, which prevents other Pokémon from lowering its stats.”
In-game text, Scarlet & Violet

Changes over time

How White Smoke changed from game to game, newest first.

Gen III · Emerald
… the Attack boost from Swagger. This added: Pokémon can still be passed negative stat modifiers through Guard Swap, Heart Swap, or Power Swap. This ability functions identically to Clear Body in battle. added: Overworld: If the lead Pokémon has this ability, the wild encounter rate is halved.

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