Properly done hacks are practically impossible to detect. Aside from the obvious stuff like looking for illegal moves, you can check if the PID matches the IVs/nature/ability/gender/shininess. If they put in enough effort to make that match up, you probably aren't going to be able to tell.What's the simplest, most effective way to hack check trades I have received on the GTS? I have a flashcard, so I can obtain the .pkm files.