In addition to the Macho Brace (under where the 8th Kanto gym leader stands; talk to him after beating him so he will move), the Soothe Bell (under where Mr. Fuji stood on the top floor of Pokemon Tower in Lavender Town), and two Leftovers (under where you used the Pokeflute to move the two sleeping Snorlaxs), there is a fifth item that is exclusive to Item Finder. On Island 2, head north to Cape Brink. There is a small pond with a single tiny square of land you can step on. In the carts, this was a PP Max, but in PokeMMO, it was nerfed. I don't recall what it is now. Perhaps a regular PP Up. Perhaps an Antidote. Maybe someone remembers. I just know it's not the PP Max that it should be.