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Reason: "Gen IV in use".
Sunny Day (Japanese: にほんばれ Clear Sky) is a Fire-type move introduced in Generation II that changes the weather to Clear Skies. It is also known as TM11.
Effects in Battle
- Powers up Fire-type moves by 1.5.
- Powers down Water-type moves by 1.5.
- Thawing out Pokémon that are frozen more quickly.
- Castform's Forecast ability makes it a Fire-type Pokémon.
- Weather Ball changes to Fire-type and doubles in power.
- Pokémon with the ability Chlorophyll will double in speed.
- Solar Beam will not require a turn to charge up.
- Hurricane will have it's accuracy reduced to 50%
- Cherrim will change form.
- Pokémon with the Solar Power ability will be damaged every turn, but Special Attack will rise.
- Pokémon with the Dry Skin ability will be damaged every turn.
- Heat Wave always hits, and also can attack foes with Protect.
- Thunder's accuracy is reduced to 50.
- Synthesis, Morning Sun, and Moonlight recovers 3/4 of total HP, instead of 1/2.
- Pokémon with Leaf Guard ability cannot be affected by status effects.
- The Heat Rock increases the duration of Clear Skies caused by Sunny Day from 5 turns to 8 turns.