Bleh, why are we assuming that Lati@s would have set nature + IVs? All the Lati@s in previous gens were randomized (ignoring R/S roamer glitch) and I don't see why it would be different this time. Drawing a complete parallel to Lucario is a bit of a stretch. Korrina's Lucario is kind of like an in-game trade, akin to Diantha's Ralts or Shauna's starter. Now, if Steven were giving us *his* Lati, I can see that happening, but the in-game dialogue suggests that it's wild. This is more similar to Xerneas / Yveltal where you "save" a legend and then it wants to join you cos you're OMG!111!!!!SPECIAL.