Ability effects when switching out?

[Enigmatic Emolga]

So I re-watched the most recent OR/AS trailer (the one that shows off Desolate Land and Primordial Sea) and immediately started to experiment with things (including adding two weather types for each of these abilities, but I digress). So I managed to get all the effects of the abilities in, expect the feature where the harsh sunlight/heavy rain stops when Groudon/Kyogre are switched out, respectively. I looked through Essentials to see if I could see any abilities that had an effect when switching out, but I couldn't find any. Does anyone know how I could add such an effect to Essentials?

 

[DL Kurosh]

Take a look at regenerator's code:

if @hp>0 && @pokemon && isConst?(self.ability,PBAbilities,:REGENERATOR)
      self.pbRecoverHP((totalhp/3).floor,true)
    end

You just need to put your code inside the def pbInitialize in PokeBattle_Battler. Then just set the weather to 0 and it should work.

 

[Enigmatic Emolga]

So something like this, then?

if !isConst?(self.ability,PBAbilities,:DESOLATELAND)
      @battle.weather=PBWeather::NONE
      @battle.weatherduration=-1
      @battle.pbDisplay(_INTL("The harsh sunlight faded!"))
    end

('NONE' is just something I used as a no weather thing. I'm still quite a noob at all this... -_-)

EDIT: Whenever I use that code, I get an error, but when I drop the '!', nothing happens.

Error:

Spoiler:

---------------------------
*game name*
---------------------------
Exception: NoMethodError
Message: undefined method `visible=' for nil:NilClass
PokeBattle_ActualScene:1353:in `pbShowWindow'
PokeBattle_ActualScene:1406:in `pbDisplayMessage'
PokeBattle_Battle:2323:in `pbDisplay'
PokeBattle_Battler:415:in `pbInitialize'
PokeBattle_Battle:2383:in `pbStartBattleCore'
PokeBattle_Battle:2359:in `pbStartBattle'
PokemonField:1143:in `pbWildBattle'
PokemonField:1142:in `pbSceneStandby'
PokemonField:1144:in `pbWildBattle'
PokemonField:1141:in `pbBattleAnimation'

 

[DL Kurosh]

I think there isn't a "none" weather in-battle, so you may need to create it (I have never created new weathers, so I don't exactly know how they work, but it should be something like this):

Go to the script section PBWeather and create a new one like this:

NONE      = X

Where X is the next weather number you haven't used.

Now, your code should be this:

if isConst?(self.ability,PBAbilities,:DESOLATELAND)
      @battle.weather=PBWeather::NONE
      @battle.weatherduration=-1 # I'm not exactly sure about this line and how this works.
      @battle.pbDisplay(_INTL("The harsh sunlight faded!"))
    end

 

[Enigmatic Emolga]

Ah, that works. Thanks again! And yes, I'd created the 'NONE' weather beforehand.
(Also the weather duration is -1 because that basically means it stays for an infinite period of time, unless it's changed of course.)