Drizzle
3 Pokémon can have Drizzle: 2 as a regular Ability and 1 as a Hidden Ability.
What does Drizzle do?
The weather changes to rain when this Pokémon enters battle. It lasts five turns (eight if the Pokémon holds a Damp Rock). If multiple Pokémon with this ability, Drought, Sand Stream, or Snow Warning 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 Drizzle? (2)
Which Pokémon have Drizzle as a Hidden Ability? (1)
How Abilities work · Hidden Abilities explained · Every Ability