Generation III Ability

Shield Dust

Protects against incoming moves' extra effects.

Shield Dust Effect

This Pokémon is immune to the extra effects of moves used against it. An extra effect is a move's chance, listed as an "effect chance", to inflict a status ailment, cause a stat change, or make the target flinch in addition to the move's main effect. For example, Thunder Shock's paralysis is an extra effect, but Thunder Wave's is not, nor are Knock Off's item removal and Air Cutter's increased critical hit rate.

“Protective dust shields the Pokémon from the additional effects of moves.”

Shield Dust Data

Introduced
Generation III
Pokémon
11
In short
Protects against incoming moves' extra effects.

Pokémon With Shield Dust

11 Pokémon can have Shield Dust.