So the Masuda Method of breeding is simple, breed two Pokemon obtained from different regions in the world and your odds of the egg being a shiny increase.
My question however is, being from the UK, will breeding one of my Pokemon with one from an American friend work? I know this may sound silly, since the UK and USA are clearly different regions of the world, however all my Japanese Pokemon have a little black box on their information screens to clearly show that they are from another region with the letters JPN on it. In some videos, I've also seen some Pokemon with a black box that shows the word FRE, which I'm assuming means it is a French Pokemon.
Sadly, no such thing for any of my friends USA Pokemon. Why is this? My American friend did trade her Poke to another one of my friends in the UK, before that UK friend traded it to me. Did this change it from a USA Pokemon to a UK one or something?