It would be impossible to walk USA. A good example is the anime series. It takes DAYS UPON DAYS to get to a city that has a gym. And by grand total standards, a good year to get to the Elite Four and such. Kanto, Sinnoh and the like are pretty much the size of USA in the Pokemon World.
We will most surely have transportation. Although, plane would be only for long-distances. I'm guessing bus, flying by Pokemon, or simply Car-pooling. Gardevoir use Teleport, anyone?
We will most surely have transportation. Although, plane would be only for long-distances. I'm guessing bus, flying by Pokemon, or simply Car-pooling. Gardevoir use Teleport, anyone?