Forecast (Japanese:てんきやTemperamental) is anAbility introduced inGeneration III. It is thesignature Ability ofCastform.

Effect

In battle

Depending on theweather, Forecast will changeCastform's form, which alsochanges its type. Castform changes as follows:

• Duringharsh sunlight orextremely harsh sunlight, it will become Sunny Form, which isFire-type.
• Duringhail, it will become Snowy Form, which isIce-type.
• Duringrain orheavy rain, it will become Rainy Form, which isWater-type.
• During asandstorm,fog,strong winds, ashadowy aura, or clear weather, it will revert to its normal form, which isNormal-type.
  • It will also revert to its normal form if a Pokémon on the field hasCloud Nine orAir Lock.

This Ability has no effect on Pokémon other than Castform.

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

Generation III

If a Pokémontransforms 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 likeColor Change).

Forecast can be copied byRole Play andTrace.

Generation IV

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

Forecast cannot be copied byTrace.

Generation V onward

If a Pokémontransforms 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 withGastro 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 byPower of Alchemy orReceiver, nor can it be traded byWandering Spirit.

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
0351		Castform Sunny Form	Fire		Fire	Forecast	None	None
0351		Castform Rainy Form	Water		Water	Forecast	None	None
0351		Castform Snowy Form	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 other games

Pokémon Mystery Dungeon series

Forecast will turn Casftorm into an Ice-type insnow. InPokémon Mystery Dungeon: Red Rescue Team and Blue Rescue Team, it will also turn Castform into a Water-type during foggy weather.

In Red and Blue Rescue Team,Explorers of Time and Darkness andSky, the type-changing effect of Forecast works on Pokémon other than Castform (such as if copied byRole Play orTrace), though the form-changing effect does not.

Description

In animation

Pokémon animated series

Castform in harsh sunlight Castform while raining Castform Changing back
The Pokémon transforms with the weather to change its type to Water, Fire, or Ice.
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

Pokémon Adventures

Normal Form Sunny Form Snowy Form Rainy Form
The Pokémon transforms with the weather to change its type to Water, Fire, or Ice.
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

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

In other languages

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

• Abilities
• Abilities introduced in Generation III
• Abilities affected by weather conditions
• Form-changing Abilities
• Abilities that change a Pokémon's type
• Abilities that cannot be copied