>>14261777I actually don't know how to do it in 3rd gen games. Maybe you should google it ? Or anyone knows how it works ?
From 4th gen onwards, it's way easier, though, due to programs like Pokesav or Pokegen, which allows you to save individual pokes as files with the extension .pkm. You can then use such files with GTS sites to download them to one of your cartridges.
