>>39257404So they can sell the "complete" version of the game to us later, just like they did with Ultra Sun and Moon. Why do sensible things like post release content patches like literally every other game company for the last 13 years when you can sell your boot-licking fanbase the same game again for $60 with 3 or 4 bells and whistles attached. USUM's extra content would be a $15 DLC pack from a normal company yet they sold it to us in a totally different game.
Do you really have enough faith in Gamefreak to think they won't try to use "NOW WITH NAT DEX" as a selling point in the future?