Drizzle is an ability introduced in Generation 3. So far, 1 Pokémon has this ability.
Drizzle summons the weather rain for five turns, unless the Pokémon is holding a Damp Rock, in which case it will last for eight turns. As Drizzle is currently only obtained through Mega Evolution, this effect cannot be legitimately used.
Outside of battle
Drizzle has no effect outside of battle.
Pokémon with Drizzle