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Reason: Generation VI details; Gates to Infinity descriptions.
The weather (Japanese: 天気 weather) is a set of mechanics in the Pokémon games that change the battle environment, activating Abilities, modifying certain moves, and potentially damaging the Pokémon in battle or affecting their stats. They have been included in every main series game since Generation II. In battle, weather is either determined by the location of a battle, due to overworld weather, or by a Pokémon creating a new type of weather with a move or Ability. Only one type of weather may be present at a time, and only the most recent type of weather will take effect.
In Generation II, only moves that cause weather were introduced and weather was only present in battles, not in the overworld. Generation III introduced overworld weather and weather-related Abilities, as well as a new weather-causing move. The biggest modification to weather in Generation IV was the introduction of four rocks that, when held, would increase the duration of weather caused by a weather move. Generation V mostly introduced greater overworld weather variability, especially in seasons affecting the weather in certain locations.
Types of weather and effects
- Clear skies: Actually the absence of weather. This is the weather found in most locations.
- Harsh sunlight: Strong sunlight shines on the battlefield. This has only occurred in the overworld in the Hoenn region, in Pokémon Ruby and Emerald, due to Groudon's emergence.
- Rain: Rain falls on the battlefield. Different variations of this weather may appear on the overworld. This is the most common weather pattern that may be found on routes and occasionally in cities.
- Sandstorm: Stinging sand whips across the battlefield. In Generations III through V, every new region had a specific area where a sandstorm was always occurring.
- Hail: Pelting hail falls on the battlefield. Different variations of this weather may appear on the overworld, and there may even be benign falling snow that does not cause hail in a battle.
- Shadowy aura: Bursts of light rain down from a shadowy aura in the sky. This type of weather is only present in Pokémon XD: Gale of Darkness and has no overworld manifestation anywhere.
- Fog: A thick fog clouds the battlefield. This only had an in-battle effect during Generation IV, but it has been present in the overworld in other Generations in a purely aesthetic form.
- Mysterious air current: A strong air current blows across the battlefield. This weather can only be present in battle, as a result of Mega Rayquaza's Ability.
There is also a glitch that occurs in Pokémon Platinum, HeartGold and SoulSilver, called acid rain, that results in the simultaneous occurrence of all then-existing weather conditions at once, damaging all Pokémon on the field.
In Generation V, the weather was given an icon which appeared on the DS or 3DS's bottom screen in a battle whenever weather was occurring. Since fog and shadowy auras were only present in-battle before Generation V, they have no icons. When there is no weather, no icon is shown.
In Generation VI the background of the bottom screen shows an animation of the current weather.
Most of the types of weather have a move or Ability that will cause that weather.
In addition, Defog may clear fog from an overworld area (in Generation IV only). It is the only move that has any effect on weather in the overworld.
Weather normally lasts for 5 turns when it is called by a move. Prior to Generation VI, weather created by an Ability would continue until the battle ended or another type of weather took its place; since Generation VI, weather created by Abilities also lasts for only 5 turns, with the exception of weather created by Desolate Land, Primordial Sea, and Delta Stream.
If a Pokémon holding one of four held items creates weather that would otherwise last 5 turns, it instead lasts 8 turns. The rock that affects each type of weather is shown below.
Three of the types of weather can do damage to Pokémon in battle at the end of a turn. In a sandstorm, hail, or shadowy aura, any Pokémon that is not Rock-, Ground-, or Steel-type; Ice-type; or a Shadow Pokémon (respectively) will be damaged for 1/16 of its maximum HP. Certain Abilities prevent damage from weather effects, though, and a Pokémon holding Safety Goggles is also immune to damage from weather effects.
Sandstorm and fog both affect the stats of Pokémon on the battlefield. Since Generation IV, in a sandstorm, the Special Defense of Rock-type Pokémon is increased by 50%. In fog, the accuracy of all Pokémon in battle is decreased.
During harsh sunlight, all Pokémon are immune to freezing.
Harsh sunlight and rain both affect the power of certain types of moves. Harsh sunlight strengthens the power of Fire-type moves by 50% and weakens the power of Water-type moves by 50%, while rain does the opposite, strengthening Water-type moves while weakening Fire-type moves.
Certain specific moves are also affected in special ways by the weather.
- The recovery moves Synthesis, Morning Sun, and Moonlight will recover different amounts* of HP depending on the weather: in clear skies, they recover 1/2 of the user's maximum HP; in harsh sunlight, they recover 2/3 HP; and in other types of weather, they recover 1/4 HP.
- The accuracy of Thunder, Hurricane, and Blizzard is affected by the weather. In hail, Blizzard ignores accuracy and evasion checks*, while Thunder* and Hurricane do the same in rain. During harsh sunlight, however, Thunder and Hurricane only have 50% accuracy. In Pokémon Diamond and Pearl, Blizzard and Thunder also had a 30% chance to hit through Protect or Detect when used in their favored weather.
- Solar Beam becomes a 1-turn move in harsh sunlight, skipping its charge turn, but in rain, sandstorm, or hail, Solar Beam's power is halved.
- Growth's stat increases double in harsh sunlight (since Generation V).
- When used as a field move in Generation IV or later, Sweet Scent will fail to work if there is a type of weather in effect in the area.
The following Abilities are activated when a type of weather comes into effect. Unless a type of weather is in effect, none of these Abilities has any effect.
In addition to the above Abilities, Harvest is guaranteed to restore a Berry whenever it triggers in harsh sunlight, and the Abilities Overcoat and Magic Guard will prevent weather-related damage.
Castform and Weather Ball
- Main article: Castform (Pokémon)
- Main article: Weather Ball (move)
Castform is a Pokémon uniquely designed to take advantage of the weather. Its Ability, Forecast, causes it to change form when a type of weather is present. Forecast does not cause a unique change for every possible type of weather, though.
Weather Ball is a move that uniquely takes advantage of the weather. In Generation III, it was introduced along with Castform and was Castform's signature move.
Whenever there is a type of weather present, Weather Ball's base power will double to 100. Weather Ball's type also changes during most types of weather.
Because of its Ability, Castform has a unique synergy with Weather Ball that no other Pokémon that can learn Weather Ball has. In harsh sunlight, rain, or hail, Castform will always get STAB thanks to its Ability.
Starting at level 50, Sliggoo will evolve into Goodra if it is leveled up while it is raining in the overworld.
In the Pokémon Mystery Dungeon series
Various weather effects appear in certain dungeons in the Pokémon Mystery Dungeon series. Weather effects can change from floor to floor, and can also be altered through the use of Wonder Orbs. In Gates to Infinity and Super Mystery Dungeon, Pokémon will not restore health via walking unless the weather is Clear, or if it is holding a Weather Band.
- Clear: NoneRBTDS
- Sunny: Fire-type moves increase power by 50%, while the power of Water-type moves is cut in half.
- Fog: The power of Electric-type moves is cut in half. Also turns Castform into a Water type.
- Snow: Ice-type Pokémon have an increased movement speed. Also turns Castform into an Ice type.
- Rain: Water-type moves increase power by 50%, while the power of Fire-type moves is cut in half. Also prevents explosions from traps and moves like Selfdestruct.
- Hail: Deals 5 points of damage to non-Ice types every 10 turns.
- Sandstorm: Deals 5 points of damage to non-Rock, Ground, and Steel types every 10 turns.
- Cloudy: Reduces the damage of all non-Normal-type moves by 25%.
Gates to Infinity descriptions
The weather is clear and pleasant. In this weather, you can restore your HP naturally just by walking.
The sun blazes. In this weather, you can't restore your HP naturally. It boosts the power of Fire-type moves and weakens Water-type moves.
It's rainy and humid. In this weather, you can't restore your HP naturally. It boosts the power of Water-type moves and weakens the power of Fire-type moves.
A sandstorm rages. In this weather, you can't restore your HP naturally. Also, all Pokémon, except Ground, Rock, and Steel types, keep taking damage. Sp. Def of Rock types goes up.
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