Forecast (Ability)

Forecast	てんきや
	Temperamental
Flavor text Generation III Changes with the weather. Generation IV Castform transforms with the weather. Generation V Castform transforms with the weather. Generation VI Castform transforms with the weather. Generation VII The Pokémon transforms with the weather to change its type to Water, Fire, or Ice. Generation VIII Currently unknown Generation IX Currently unknown

Forecast (Japanese: てんきや Temperamental) is an Ability introduced in Generation III. It is the signature Ability of Castform.

Effect

In battle

Depending on the weather, Forecast will change Castform's form, which also changes its type. Castform changes as follows:

• During harsh sunlight or extremely harsh sunlight, it will become Sunny Form, which is Fire-type.
• During hail, it will become Snowy Form, which is Ice-type.
• During rain or heavy rain, it will become Rainy Form, which is Water-type.
• During a sandstorm, fog, a mysterious air current, a shadowy aura, or clear weather it will revert to its normal form, which is Normal-type.
  • It will also revert to its normal form if a Pokémon on the field has Cloud Nine or Air Lock.

This Ability has no effect on Pokémon other than Castform.

Forecast does not change Castform's form until after Stealth Rock deals damage.

Generation III

If a Pokémon transforms into Castform with Forecast, it will change forms with the weather just like Castform.

If Castform or a Pokémon transformed into Castform loses Forecast, it will be stuck in its current form. When it regains Forecast, it will change to the form matching the current weather, even if it is already in the correct form (which resets its type if it had changed due to an effect like Color Change).

Forecast can be copied by Role Play and Trace.

Generation IV

If Forecast is suppressed with Gastro Acid, it will be stuck in its current form.

Forecast cannot be copied by Trace.

Generation V onward

If a Pokémon transforms into Castform, the Pokémon will remain in the same form as the target Castform, regardless of the weather.

If Castform loses Forecast or Forecast is suppressed with Gastro Acid, it will revert to its normal form and not be able to change form. If Castform regains Forecast, it will change form to match the current weather, unless it would be in its normal form in the current weather.

Role Play fails if the target has the Ability Forecast. Entrainment fails if the user has the Ability Forecast. Forecast cannot be copied by Power of Alchemy or Receiver.

Outside of battle

Forecast has no effect outside of battle.

Pokémon with Forecast

#	Pokémon		Types		First Ability	Second Ability	Hidden Ability
0351		Castform	Normal		Normal	Forecast	None	None
351S	Castform	Castform	Fire		Fire	Forecast	None	None
351R	Castform	Castform	Water		Water	Forecast	None	None
351H	Castform	Castform	Ice		Ice	Forecast	None	None
Please note that Abilities marked with a superscript are only available in the stated generation or later. For Generation III and IV games, ignore Hidden Abilities.

In the anime

Castform in harsh sunlight Castform while raining Castform activating Forecast Castform activating Forecast
Castform's body glows and changes to an alternate form depending on the weather.
Pokémon	Method
User	First Used In		Notes
	Castform's body glows white when the weather is calm and it transforms into its Normal Form.
Bart's Castform	Unfair Weather Friends		Debut
	Castform's body glows blue when it starts to rain and it transforms into its Rainy Form.
Bart's Castform	Unfair Weather Friends		Water type
	Castform's body glows red or white when there isn't a cloud in the sky and it transforms into its Sunny Form.
Bart's Castform	Unfair Weather Friends		Fire type
An ally Castform	Currying Favor and Flavor!		Fire type
	Castform's body glows blue when it starts to snow and it transforms into its Snowy Form.
A Trainer's Castform	Mounting an Electrifying Charge!		Ice type

In the manga

In the Pokémon Adventures manga

Rainy form Sunny form Snowy form Castform
Castform's head becomes surrounded by a transparent shape depending on the form it will take. It then transforms its body into an alternate form depending on the weather.
Pokémon	Method
User	First Chapter Used In		Notes
	Castform's head becomes surrounded in a transparent shape depending on the form that it will take and it transforms its body depending on the weather.
Ruby's Fofo	Mowing Down Ludicolo		Debut

Trivia

• In Pokémon XD: Gale of Darkness, while Castform transforms, a Trainer will play the animation used if one of their Pokémon faints.

In other languages

Language Title Chinese Cantonese 陰晴不定 Yām-Chìhng Bātdihng Mandarin 陰晴不定 / 阴晴不定 Yīn-Qíng Bùdìng * 天氣預報 Tiānqì Yùbào * French Météo German Prognose Greek Πρόβλεψη Próvlepsi Italian Previsioni Korean 기분파 Gibunpa Portuguese Previsão do Tempo Spanish Predicción Vietnamese Dự báo thời tiết

This article is part of Project Moves and Abilities, a Bulbapedia project that aims to write comprehensive articles on two related aspects of the Pokémon games.