Originally Posted by Fat Juggler
The idea that Pokemon slowly heal inside their pokeballs is an interesting one, because it would mean that the pokeball is more than just a containment unit.
I was going to say that doesn't happen ingame - but it does
, in the several locations you can have a nap.
Then again, this doesn't need to have anything to do with the Poke Balls exactly.
"If I may guess, Emboar might be an exception to the norm that the scalding liquid is expelled from the Pokémon's mouth" - Cobraroll, on Emboar learning Scald.
"Nothing like a cup of tea to start off the day" - Professor Oak, EP025.