Cloud Nine is a Pokémon ability that alters the battlefield by nullifying the effects of weather. When a Pokémon with Cloud Nine is present in battle, all weather-related effects are negated as long as it remains active. This means that any ongoing weather conditions, such as Rain, Sun, Hail, or Sandstorm, have their supplementary effects—such as damage boosts, healing, or status changes—rendered ineffective. However, the weather itself does not disappear; it simply becomes dormant while Cloud Nine is in effect.
Here are some key points and interesting facts about Cloud Nine: