Snowstorm, forfeiting trainer battles, battle outcome values

Data/Scripts/010_Data/001_Hardcoded data/015_BattleWeather.rb

@@ -56,6 +56,12 @@ GameData::BattleWeather.register({
   :animation => "Hail"
 })
 
+GameData::BattleWeather.register({
+  :id        => :Snowstorm,
+  :name      => _INTL("Snowstorm"),
+  :animation => "Snowstorm"
+})
+
 GameData::BattleWeather.register({
   :id        => :HarshSun,
   :name      => _INTL("Harsh Sun"),