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Weather

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Weather is a mechanic used in Pokémon games since Generation II. Weather patterns can occur from some moves or overworld effects, but all have impacts on battle.

Clear Skies

No changes.

Cloudy

Fog

Generation IV

In Battle

Outside of Battle

Generation V

Fog exists but is purely aesthetic.

Pokémon Mystery Dungeon

  • Electric-type moves do 50% less damage.
  • Castform transforms into it's Rainy form.

Hail

Causes

Effects

In Battle

  • Damages all Pokémon for 1/16 of its maximum HP unless:
  • Castform transforms into it's Snowy form.
  • Doubles the power of Weather Ball and changes it to an Ice-type move.
  • Halves the power of Solar Beam.
  • Moonlight, Morning Sun and Synthesis only recover ¼ of max HP.
  • Blizzard has 100% accuracy.
  • Blizzard hits through Detect and Protect.DP

Outside of Battle

Pokémon Mystery Dungeon

  • Deals five points of damage to all Pokémon except Ice-type Pokémon every ten turns.

Mysterious Air Current

Causes

Effects


Rain

Causes

  • Rain Dance
  • Drizzle

Effects

In Battle

  • Increases the power of Water-type moves by 50%.
  • Halves the power of Fire-type moves.
  • Activates:
  • Castform transforms into it's Rainy form.
  • Doubles the power of Weather Ball and changes it to a Water-type move.
  • Halves the power of Solar Beam.
  • Moonlight, Morning Sun and Synthesis only recover ¼ of max HP.
  • Hurricane and Thunder have 100% accuracy.
  • Hurricane and Thunder hit through Detect and Protect.DP

Outside of Battle

Pokémon Mystery Dungeon

Heavy Rain

Causes

Effects

The following will fail:

  • Damaging Fire-type moves
  • Drizzle
  • Drought
  • Hail
  • Sand Stream
  • Sandstorm
  • Snow Warning
  • Sunny Day

Sandstorm

Causes

  • Sand Stream
  • Sandstorm

Effects

In Battle

  • Damages all Pokémon for 1/16 of its maximum HP unless:
  • Rock-type Pokémon's Special Defense is raised by 50%.
  • Doubles the power of Weather Ball and changes it to a Rock-type move.
  • Halves the power of Solar Beam.
  • Moonlight, Morning Sun and Synthesis only recover ¼ of max HP.

Outside of Battle

Pokémon Mystery Dungeon

  • Deals five points of damage to all Pokémon except Ice-type Pokémon every ten turns.

Shadowy Aura

Causes

Effects

  • Damages all Pokémon except for Shadow-type Pokémon for 1/16 of its maximum HP.
  • Doubles the power of Weather Ball and changes it to a ???-type move.

Snow

  • Ice-type Pokémon have their speed raised by 1.
  • Castform transforms into it's Snowy form.

Sunlight

Causes

  • Drought
  • Sunny Day

Effects

  • Increases the power of Fire-type moves by 50%.
  • Halves the power of Water-type moves.
  • Solar Beam can be used instantly.
  • Doubles the effects of Growth.
  • Activates:
  • Castform transforms into it's Sunny form.
  • Doubles the chance of Harvest.
  • Doubles the power of Weather Ball and changes it to a Fire-type move.
  • Prevents freezing.
  • Moonlight, Morning Sun and Synthesis recover ⅔ of max HP.
  • Lowers accuracy of Thunder and Hurricane to 50%.

Harsh Sunlight

Causes

Effects

The following will fail:

  • Damaging Water-type moves
  • Drizzle
  • Drought
  • Hail
  • Sand Stream
  • Sandstorm
  • Snow Warning
  • Sunny Day

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