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Sunny Day (Japanese: にほんばれ Clear Sky) is a non-damaging Fire-type move introduced in Generation II.
It is:
Effect
Generation II
When this move is used, the sunlight will brighten the field. This effect will last for 5 turns, during which Pokémon cannot be frozen (though this does not affect when an already-frozen Pokémon thaws). This clears any other type of weather and is usable even when it's already sunny.
While Sunny Day is in effect, the base power of Fire-type moves will be increased by 50%, and the base power of Water-type moves will be decreased by 50%. In addition to this, the moves Synthesis, Morning Sun, and Moonlight will recover twice as much HP as under clear conditions, Solar Beam will not require a turn to charge, and the accuracy of Thunder is lowered to 50%.
Generations III and IV
This move now fails when the weather is sunny.
Synthesis, Morning Sun, and Moonlight will now instead recover ⅔ of the user's HP in harsh sunlight. Additionally, Castform (due to its Ability, Forecast) and Weather Ball become Fire-type.
If a Heat Rock is held when Sunny Day is used, the duration of sunlight lengthens from 5 to 8 turns. Additionally, the following Abilities will have the effects listed while the sun is shining:
- Pokémon with the Chlorophyll Ability will have their Speed doubled.
- Pokémon with the Dry Skin Ability will lose ⅛ of their maximum HP at the end of each turn.
- Pokémon with the Flower Gift Ability will raise the team's Attack and Special Defense by 50%. Cherrim will transform into its Sunshine Form, though this is not tied to Flower Gift itself in Generation IV.
- Pokémon with the Solar Power Ability will have their Special Attack raised by 50% and lose ⅛ of their HP each turn.
- Pokémon with the Leaf Guard Ability will be immune to being inflicted with non-volatile status conditions.
Sunny Day can be used as the first move of a Pokémon Contest combination, causing Blast Burn, Blaze Kick, Ember, Eruption, Fire Blast, Fire Punch, Fire Spin, Flame Wheel, Flamethrower, Heat Wave, Moonlight, Morning Sun, Overheat, Sacred Fire, SolarBeam, Synthesis, Weather Ball, and Will-O-Wisp to score double the normal appeal if used in the next turn.
Generation V to VIII
Growth now raises the user's Attack and Special Attack by two stages instead of just one. Hurricane's accuracy will be lowered, similarly to Thunder. Harvest will never fail to restore a Berry.
If heavy rain, extremely harsh sunlight, or strong winds are present, Sunny Day will fail.
While Sunny Day is in effect, Solar Blade will not require a turn to charge.
Sunny Day can also be used as part of a Contest Spectacular combination, causing certain moves (Growth, Moonlight, Morning Sun, Solar Beam, Synthesis, and Weather Ball) to give an extra three appeal points if used in the next turn.
If powered up by a Firium Z into Z-Sunny Day, the user's Speed stat is raised by one stage.
Generation IX
Sunny Day can no longer override weather in the overworld.
Description
|
Learnset
By leveling up
By TM
Special move
Generation IV
| # | Pokémon | Types | Egg Groups | Obtained with | ||
|---|---|---|---|---|---|---|
| 0240 |  |  | No Eggs Discovered | Pokéwalker - Rugged Road | ||
| Bold indicates a Pokémon gains STAB from this move. Italics indicates a Pokémon whose evolution or alternate form receives STAB from this move. A dash (−) indicates a Pokémon cannot learn the move by the designated method. An empty cell indicates a Pokémon that is unavailable in that game/generation. | ||||||
In other games
Pokémon Mystery Dungeon series
Sunny Day turns the current floor's weather to sunny for 18 turnsRB / entire floorTDSGtI / 66 turnsSMD.
Pokémon Masters EX
Description
|
In the anime
 Jumpluff  Sunlight  Sunshine Form Cherrim  Arcanine | |||
| The user causes the sun's rays to intensify, powering up Fire-type attacks. | |||
| Pokémon | Method | ||
|---|---|---|---|
| User | First Used In | Notes | |
 | Sunkern's eyes become fiery and it releases a white beam of light to the sky, causing the sun to shine brighter. | ||
| A wild Sunkern | Moving Pictures | Debut | |
 | Budew causes a bright and warm light to appear in the sky. | ||
| Nando's Budew | Dawn of a New Era! | None | |
 | White orbs appear in front of the flowers on Roselia's arms. It then raises its hands to the sky and it releases two white beams from the orbs on its hands at the sun, making the sunlight brighter. | ||
| Nando's Roselia | Dawn of a New Era! | None | |
 | Two white orbs appear in front of the flowers on Roserade's arms. It then raises its arms to the sky and releases two white beams from the orbs on its hands at the sun, making the sunlight brighter. | ||
| Forsythia's Roserade | Oh Do You Know the Poffin Plan! | None | |
 | Two white orbs appear on the ends of Sunshine Form Cherrim's arms, and it releases the two white orbs into the sky. The orbs combine as one and form a bright sun over the battlefield. | ||
| Lila's Cherrim | Battling the Generation Gap! | None | |
 | Solrock flies high above the battlefield and its body starts to glow bright yellow. The yellow glow then fades and it releases green sparkles from its body and yellow beams of energy shoot off its body and shine brightly. | ||
| A wild Solrock | Pikachu's Ice Adventure | None | |
 | Maractus's hands become surrounded by golden energy and it raises both of its hands into the air. It then fires two golden beams of energy from its hands into the sky. The two beams of energy fly high into the sky and twist around each other, forming an orb. As they do, the two beams turn white. The orb releases a burst of energy in an explosion of color, releasing multicolored sparkles as it does. | ||
| Toby's Tussy | A Maractus Musical! | None | |
 | Jumpluff's body becomes surrounded in golden energy and it raises both of its hands into the air. It then fires multiple golden rings of energy into the sky, causing the sky to become sunny and clear; or, Jumpluff raises the cotton spores at its sides into the air, causing the sun to shine brighter, with a bright beam of white light covering its body while using the move. | ||
| Ramos's Jumpluff | Thawing an Icy Panic! | None | |
 | Castform cries towards the sky, causing the sun to shine brighter. When Castform faints, the sunlight returns to normal. | ||
| An ally Castform | Currying Favor and Flavor! | None | |
 | Dustox releases a bright flash of light from its body, causing the sky above it to become clear and free of clouds. | ||
| Goh's three Dustox | Panic in the Park! | None | |
 | Ludicolo lets out a yell towards the sky, causing the sun to shine brighter and making the sky above Ludicolo clear and free of clouds. | ||
| A wild Ludicolo | Up to Your Neck! | None | |
 | Arcanine lets out a howl towards the sky, causing the sun to shine brighter and making the sky above clear and free of clouds. This also boosts the power of Fire-type attacks. | ||
| Diana's Arcanine | HZ033 | None | |
In the manga
Pokémon Adventures
- Courtney's Ninetales was revealed to know Sunny Day on the official website, but she was never shown using the move.
Pokémon Battle Frontier
 Tropius | |||
| The user causes the sun's rays to intensify. | |||
| Pokémon | Method | ||
|---|---|---|---|
| User | First Chapter Used In | Notes | |
 | Tropius roars while looking at the sky, causing the sun's rays to intensify. | ||
| Enta's Tropius | Aim for the Top! | Debut | |
Pokémon Diamond and Pearl Adventure!
Pocket Monsters Platinum: Aim to Be Battle King!!
 Infernape | |||
| The user causes the sun's rays to intensify. | |||
| Pokémon | Method | ||
|---|---|---|---|
| User | First Chapter Used In | Notes | |
 | Infernape raises its hands into the sky, causing the sunlight to intensify. | ||
| Yū Shirogane's Infernape | PBK3 | Debut | |
