I would imagine pokedex have a activity log, but that already is up to us.


Anyway on topic up to us. About the pokeball discussion.

I was going to go with the idea that pokemon at first are in a black void. But with time they spend inside the ball they can shape the black void into objects and a environment they can call home. As well make an exit door that would allow them to leave their pokeball at will, or a tv with which they can watch to stay aware what is happening around their ball.
Friend ball, heal ball, luxury balls, net ball etc make it easier to change the black void or for some pokemon species make it really easy to shape it, or maybe they come in with something already there to make the pokemon feel better.