Especially the Pokemon one. It could be that Pokemon is set in a fictional Japan that didn't surrender after Hiroshima and Nagasaki and instead carried on the war. They lost a lot of men in conventional warfare and their country was also repeatedly hit with nuclear strikes from United States. This meant that 80% of the adult men in Japan died, and it also mutated animals into Pokemon. This explains why there are so few adult men (except the fat guys, the old guys, the Team Rocket guys, possible homosexuals and scientists who weren't in the army for obvious reasons), as well as why there isn't a great deal is known about Pokemon. The war forced Japanese scientists to come up with new technologies, like whatever machines they have in Pokemon centres that heal any ailment instantly, and the technology in Pokeballs.