After earning your second Gym Badge (though you can visit here beforehand if you're in search of Pokémon; you just won't fight Team Flare), head north of Cyllage City to reach Route 10.
|Wild Pokémon on Route 10|
|Eevee||Normal||19-21||More common in Yellow flowers.|
|Golett||GroundGhost||19-21||More common in Yellow flowers.|
|Hawlucha||Fight||19-21||More common in regular grass.|
|Sigilyph||Psychc||19-21||More common in regular grass.|
|Yanma||Bug||10 (Horde)||Common. Only appears in a horde (5x Yanma).|
|More common in Yellow flowers. Can also rarely show up in a horde (5x Houndour). Pokémon X only.|
|More common in Yellow flowers. Can also rarely show up in a horde (5x Electrike). Pokémon Y only.|
|Snubbull||Fairy||19-21||More common in Yellow flowers.|
|Nosepass||Rock||10 (Horde)||Common. Only appears in a horde (5x Nosepass).|
If you haven't already done so, you can pick up the fallen Iapapa Berry right near the entrance to the route. To the north of that tree, if you've taught Strength to one of your Pokémon, you can move a boulder into a hole to reveal a little alcove with a hidden Revive just south of a second boulder.
This second boulder is much tricker to get to its destination thanks to all of the rocks blocking the path. Go just to the north of the boulder and then push it two times to the south, then push it three times to the east, two times to the north, three more times to the east, once to the north, and then all the way east until it lands in the pit, allowing you to cross and receive TM73 Thunder Wave, which paralyzes the foe in battle.
Anyway, back to the main road, the first Trainer you'll find is Psychic Robert. Battle him if you haven't yet; he uses a Solosis L22. Further west is Tourist Fumiko with a Skiploom L19, a Dunsparce L19, and an Azumarill L19.
North of her are the mysterious stones that adorn the route. If this is your first trip, be sure to pick up the items here: Just to the east from the entrance is a Mind Plate, which boosts the power of the holder's Psychic-type moves. To the north of that, in the corner of the first area of the stones, is a hidden Paralyze Heal. In the northwest part of the first segment, you'll find an X Accuracy.
Once you've beaten him, he'll run off, leaving you free to explore the next segment. If you haven't yet, find the hidden Burn Heal directly east. Running around the center is Psychic Sayid, who has a Meditite L19 and a Kirlia L21. To the north of him, in the northwest part of this segment, is a Thunder Stone. Be sure to grab it if you didn't before, especially if you're looking to evolve your Pikachu or Eevee.
Head over to the gate to the next segment and you'll have to fight another Team Flare Grunt. She uses an Electrike L23 and a Croagunk L21. Follow the path and fight a third Team Flare Grunt, this one using a Gulpin L24. Just to the right of that Team Flare Grunt is Tourist Tomoko, in case you didn't fight her before. She uses a Drifloon L19, a Hippopotas L19, and a Pachirisu L19.
That's all there is to Route 10, as to the north you'll find the entrance to Geosenge Town.