@MrKijani: "As another example, if one parent holds a Power Anklet and the other parent holds a Power Weight, the baby will inherit either a Speed IV from the first parent or an HP IV from the second parent, and it will also inherit two different IVs from its parents other than Speed or HP."
So it will still only passdown 1 (for sure) the other 2 will remain random. That sure IV will be either HP or speed (in this case, as it's the anklet & the weight)
@Marzipan: I get it now. though this brings me to another question, how do we go about creating a perfect pkmn if only 3 IVs will be passed down? luck/abuse?