I am doing the "Coil Loop" on the GTS. (If you don't know, it's everyone trading Magnemites in order to get better stuff on Join Avenue.)
But when I go to "Seek Pokemon", every time I find one to trade it says "unfortunately, it was traded to another trainer". And it's not just that it got traded away in those few seconds, if you search again the same trainer with the same Pokemon shows up!
Anyone have any tips to avoid this? I have tried limiting the search to a country but no luck yet. I tried Japan, USA, UK, Italy and France. Keep getting the same message!