You may have noticed ingame these new features that we added recently.
All these new boost and nerf changes have a duration length of 10 seconds. If another boost or nerf change is received, then the old one is removed to apply the new one. The spells that alter the weather have a radius of 6 tiles and affect all creatures inside it (players in duels aren't disturbed if spell is casted by other Pokémon unrelated to duel).
These spells have had a change related with weather and boost, nerf or damage
Rain Dance. Invokes a rainfall. Boosts water-type attacks by 10% and decreases fire-type attacks by 10%.
Sunny Day. Makes the sunlight brighten the area. Boosts fire-type attacks by 10% and decreases water-type attacks by 10%.
Hail. Starts a hailstorm on the field, causing a recurrent damage to all non Ice-type Pokémon inside it.
Sandstorm. Brews a sandstorm. All Pokémon who are neither Steel, Rock, nor Ground-type will be damaged.
Snow Warning. Invokes a hailstorm. Works as Hail but with a longer duration.
Blizzard. It has 20% of chance to start a hailstorm.
These spells with the old type of absolute boost are not affected and don't get mixed with the new elemental boosts.
Agility
Calm Mind
Dragon Dance
Electric Charge
Focus
Focus Energy
Furious
Fury
Helping Hand
Nasty Plot
Psycho Boost
Rage
Strafe
Sunny Day
Ultimate Agility
Ultimate Champion
War Dog
If by any reason you don't want to see the weather effects, you can disable the shaders in your client. (Options -> Use shaders). These changes are a prelude to new features that we will implement in game later.