Rewrote and standardised several PBS writer methods

Data/Scripts/010_Data/002_PBS data/004_Move.rb

@@ -811,5 +811,12 @@ module GameData
       data[:function_code] = new_code
       return data
     end
+
+    alias __orig__get_property_for_PBS get_property_for_PBS
+    def get_property_for_PBS(key)
+      ret = __orig__get_property_for_PBS(key)
+      ret = nil if ["Power", "Priority", "EffectChance"].include?(key) && ret == 0
+      return ret
+    end
   end
 end