>>54874761>FightingThe ability to dent or break apart metal is a common way to show an audience that this character has super strength.
>WaterI have no idea why people always suggest this. Water doesn't immediately do anything bad to metal, what destroys it is rust which is a very slow process that isn't remotely relevant to a Pokemon battle
>ElectricThis one is tricky. Depending on the fictional media, metal will inconsistently be weak to electricity, or it will act like a protective material to guard against electricity. This seeming inconsistency exists because it's reflective of real life, which is why in Pokemon it's merely neutral.
People understand that "metal conducts electricity" but the context is important. All conductive means is that electricity is easily attracted to and easily passes through metal. So is the metal making it so the electricity passes directly into YOU? Or is the metal acting as a shield that conducts it AWAY from you? These are heavily context dependent.