There don't seem to be many automobiles or roadways in the Pokemon world, either. Or at least, none outside of big cities. There are plenty of streets, but few cars. Ash and them get everywhere by foot, usually. There aren't any governments, no military force, and the only police seem to be one Jenny per town, no matter what the size. Most of the culture and commerce revolves around Pokemon. There's no schooling, except in Pokemon training. Children are allowed to out and hunt and catch dangerous animals that can easily kill several humans if provoked. Some kids even run Pokemon Gyms and are respomsible for the financial wellbeing of their families. Immoral cloning and gang crime are rampant and undealt with. Areas with little more than a few buildings are easily labeled "towns".
It's a fucked up world..