Snow Warning
8 Pokémon and forms can have Snow Warning: 4 as a regular Ability and 4 as a Hidden Ability.
What does Snow Warning do?
The weather changes to snow when this Pokémon enters battle (hail before Generation IX). It lasts five turns (eight if the Pokémon holds an Icy Rock). If multiple Pokémon with this ability, Drizzle, Drought, or Sand Stream are sent out at the same time, the abilities will activate in order of Speed, respecting Trick Room. Each ability's weather will cancel the previous weather, and only the weather summoned by the slowest of the Pokémon will stay.
Which Pokémon have Snow Warning? (4)
Which Pokémon have Snow Warning as a Hidden Ability? (4)
How Abilities work · Hidden Abilities explained · Every Ability