It does suck a bit that you can't play as Munchlax in sky. There is also male-locked and female-locked starters which leads me to believe they were maybe running out of natures for their quiz?
They have 16 natures which would make sense for a game without a speed stat, if the natures they did include didn't include natures like "Sassy" or "Relaxed", which do affect speed...
They could also just add more questions to the quiz if the existing ones didn't cover a large enough range.