namespace Gen7 {
    [Ability effect=PreventDefLowering]
    class PreventDefLowering : PkmnScript {
        void PreventStatBoostChange(Pokemon@, Statistic stat, int8 amount, bool &inout prevent) override {
            if (stat == Statistic::Defense && amount < 0) {
                prevent = true;
            }
        }
    }   
}