We covered this 'Supplemental Computing Device' patent submission awhile back, but now Nintendo has been granted the patent for North America. This patent seems to refer to a Supplemental Computing Device that can communicate with other like devices to draw power from them. As with all Nintendo patents, we may never see this actually used in a real-life application from Nintendo.
Looks like you don't have to travel the world to get region-exclusive Pokémon. A couple players have come forward with accounts that show region-exclusive Pokémon being caught from hatched eggs. You'll have to get very lucky to get a region-exclusive Pokémon this way, but at least now we know it's possible. Cancel that trip to Europe and get ready to do a TON of walking in your neighborhood!