@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."
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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?