He seems dedicated to hedonism, pleasure and decadence. He causes death and destruction "in the name of sex." He is Immune to Bullets. He comes up with a ultra-cool, high-tech base and gadgets out of nowhere. He is able to put emeralds into a gun and fire them without gunpowder into another man and not miss or have any emerald bullet pass through him. He survives a tide of molten gold. He knows how to fake his death and then come out of it exactly when he wants. He knows exactly when a shipment is a decoy and can go after the real thing; knowledge that he could not possibly have. As Crow on Mystery Science Theater 3000 says "This guy operates under incredible luck and circumstance." I would say that Diabolik is watched over by something supernatural. No wonder the inspector and the authorities are constantly frustrated in their efforts to catch him. Clearly this man is not human or has strange powers.
