Flafpert, I completely agree. However, I like to be mystical. Consider this, most water types ARE NOT COMPLETELY MADE OF WATER. Indeed it's true, they actually consist of solid flesh, with water only being a significant component. In fact, most of them have definate, solid, biological forms, except maybe castform. As such, it is possible to transform a Pokemon into a water type without completely turning into water. All that needs to be done is add the water component.