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Raises the power of Rock-type moves 20% when this item is held. Pokemon with Multitype become Rock-type.
On any Pokemon other than Arceus, this item performs almost exactly like Rock Incense; for information on the competitive use of this item, see the Rock Incense description. The only difference between these two items is the Fling Base Power; Stone Plate has 90 Base Power when Flung while Rock Incense has 10.