After encountering a disappearing Team Flare Grunt and battling Korrina's Lucarios in Geosenge Town, you go east to Miroir Way.

Battle and Catch

In the grass here, you can find Nidorina, Nidorino, Hariyama, Staravia, Chingling, Stunky, Throh (Y only), Sawk (X only), and Dedenne. In addition, you might have horde encounters with Nidoran♀, Nidoran♂, Starly, and Stunky.

Near the beginning of the route, there is a Sitrus Berry tree.

Near the tree, you encounter Psychic Emanuel, who has a level 24 Solosis and a level 24 Sigilyph.

There are some stairs to the east of the Sitrus Berry Tree, and just above those stairs there is a mysterious glowing stone. There is a hidden Super Potion on that stone.

South of that stone, Battle Girl Gerardine is running around. She has a level 28 Mienfoo.

If you go east, then north, and approach the stairs, you receive a Holo Clip from Professor Sycamore telling you to visit the Mega Evolution guru who lives in Shalour City.

Go west before going up the stairs and there is a prickly tree that you can cut down if you have a pokémon with you that knows Cut. Go past where the tree was and go north. There is a slope that you can slide down to the left of the sign. At the bottom of the slope you find TM69 Rock Polish.

Now go back to where the prickly tree was. Go up the stairs and then go to the right, into the grass. Go south to find a Hyper Potion.

Go up the long set of stairs near where you found the Hyper Potion. At the very top, there is a hidden Thunder Stone on the uppermost glowing rock that you can find with your Dowsing Machine.

If you walk to the very north edge of this hill, a Sky Trainer across the gap will ask if you want to battle her. Keep in mind that in a sky battle you can only use pokémon that have the Flying type. Sky Trainer Yvette has a level 23 Emolga, a level 24 Staravia, and a level 23 Wingull.

Now go back down to the grass and go north. Near the cave entrance, you see a psychic and a black belt standing next to each other. They are a team that will challenge you to a double battle: Brains & Brawn Frank & Sly. They send out a level 28 Machoke and a level 26 Mr. Mime.

North of them, you find Reflection Cave.