This goes to show that they have made too many dragon types. In Gen one, when Charizard was made, there were like, three, and only one dragon type move that I remember. They were just supposed to be cool and rare and powerful, so they had a lot of resistances and didn't have any moves with STAB, so they were balanced enough. Then they multiplied to the point that Nintendo added heckin' FAIRY type to try and balance it.