Well, I don't know about these items. But if you're talking about the Charcoal, Mystic Water, Miracle Seed etc., Bulbapedia says it's a type enhancing item which makes certain moves have a bit of boost like Fire, Water ,Grass etc. What I wanted was an item that would boost a certain Pokemon's Stats in a multiple manner for example, this one item will make your Pokemon have it's Attack, Sp. Def and Speed raised when held. ~