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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.

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

Contents

Effect

In battle

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

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
Castform Castform Normal Normal Forecast None None
Castform Castform
Sunny Form
Fire Fire Forecast None None
Castform Castform
Rainy Form
Water Water Forecast None None
Castform Castform
Snowy Form
Ice Ice Forecast None None
Please note that this is only 100% accurate to Generation VII games.
  • For Generation III games, ignore Abilities introduced in Generation IV or later and Hidden Abilities.
  • For Generation IV games, ignore Hidden Abilities.
  • For Generation V games, ignore Abilities introduced in Generation VI or later.
  • For Generation VI games, ignore Abilities introduced in Generation VII.

In the anime

Sunny Castform.png Rainy Castform.png Bart Castform Forecast Rain Dance.png Bart Castform Forecast.png
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
351 Castform Castform's body glows white when the weather is calm and it transforms into its Normal Form.
Bart's Castform Unfair Weather Friends Debut
351R Castform 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
351S Castform 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
351H Castform 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


Trivia

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 *
France Flag.png French Météo
Germany Flag.png German Prognose
Greece Flag.png Greek Πρόβλεψη Próvlepsi
Italy Flag.png Italian Previsioni
South Korea Flag.png Korean 기분파 Gibunpa
Portugal Flag.png Portuguese Previsão do Tempo
Spain Flag.png Spanish Predicción
Vietnam Flag.png Vietnamese Dự báo thời tiết


Abilities affected by weather conditions
Sand VeilSwift SwimChlorophyllForecastDry SkinRain DishSnow CloakHydrationSolar PowerLeaf GuardIce BodyFlower GiftSand ForceSand RushSlush Rush


Project Moves and Abilities logo.png 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.