Okay so I'm playing Pok?mon X and I'm on route 10 and I have no idea what to do. I looked up a Pok?mon X route 10 walkthrough and it says that a Team Flare Grunt appears and when I went to the spot where he appears no one is there! I collected all the Pok?balls and challenged every trainer but he won't show up! :l
Sounds like you need to backtrack a bit. You must have missed something earlier[though I'm not entirely sure how you managed to miss something.. pretty sure the triggers force you to progress on a set path..]
I assume you've collected every badge from the gyms you've passed so far[I don't remember which gyms you've passed already by route 10, but chances are you either missed a gym; or you're getting ahead of where you actually are]
route 10..that's the same place I got stuck at. Yeah, I think you need to back track. Did you go down route 9? I don't want to give away too much but route 9 is were you ride the rhyhorn. Make sure you go to the very end of the cave.
I suggest not using guides unless super stuck. I like to have the story line unfold with no spoilers. A few games have gotten my to cry, some have caused me to burst out laughing. I prefer no guides unless it's necessary (stuck for days).
