Well, normally it has a type so it can but its power is indeterminated and the user doesn't use something ''special of the dark type'' he just throw an item...
If you use any Dark type pokemon (i recommend weavile) with an iron Ball, the power will be 130 plus STAB
but you need to use it right away because holding the iron ball cuts your speed, but it is the best item that you can "fling"
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