Gen7Data/Scripts/Abilities/ChangeMoveType.as

namespace Gen7 {
    [Ability effect=ChangeMoveType]
    class ChangeMoveType : PkmnScript {
        uint8 _fromType;
        uint8 _toType;
        bool _changedLastAttack = false;

        void OnInitialize(const BattleLibrary@ library, const narray<EffectParameter@>@ parameters) override {
            auto lib = library.StaticLibrary.TypeLibrary;
            _fromType = lib.GetTypeId(parameters[0].AsString());
            _toType = lib.GetTypeId(parameters[1].AsString());
        }

        void ChangeAttackType(ExecutingMove@ move, Pokemon@ target, uint8 hit, uint8 &inout t) override {
            if (_fromType == t){
                t = _toType;
                _changedLastAttack = true;
            }
            else{
                _changedLastAttack = false;
            }
        }

        void ModifyDamageModifier(ExecutingMove@, Pokemon@, uint8, float &inout damageMod) override {
            if (_changedLastAttack){
                damageMod *= 1.2f;
            }
        }
    }
}