>>58729643It doesn't. This is an instance of ludonarrative dissonance, where gameplay trumps worldbuilding, and officially speaking, we don't know how Kangaskhan Eggs are meant to work in actuality because there's never been a scenario where one has canonically been depicted.
This is also why your female Cubone/Marowak doesn't turn up dead because you bred her to get a Cubone, but the Cubone still somehow produces a skull to wear that it considers to be its mother's skull, who it now laments and weeps for despite the fact its mother is alive and well.
