Route 8, or Muraille Coast, is a road of great contrasts. The upper cliffside path leads southward from Connecting Cave to Ambrette Town. After passing through Ambrette, it is possible to take the lower seaside path northward to Cyllage City.
A short distance from Connecting Cave, you are approached by Sina and Dexio. They upgrade your Pokédex with the Coastal Kalos listing, which encompasses the Pokémon found in the western third of the region. Then the two disappear as soon as they arrive.
To the south, a muddy pit is located just outside Ambrette Town. This forces travelers to jump from one stepping stone to another in order to cross it. Be sure to collect the Leaf Stone to the east!
Try a Sky Battle
Cross the muddy pit from the north side, and land on one of the eastern stones. This causes you to be challenged by Howe, a Sky Trainer. Trainers of this class only participate in Sky Battles, an optional battle format where only Flying or Levitating Pokémon are eligible.
Ambrette is a dusty little town situated between Route 8 and Route 9. The town is known for its Aquarium and its Fossil Lab, where Pokémon Fossils are studied and restored.
Serena/Calem appears when you reach the stairway leading down into Ambrette. She/He suggests checking out the Fossil Lab, as the Scientists there may know something about the mysterious Mega Stones.
A Smashing Good Time
Speak to the girl near the Pokémon Center to receive TM94 (Rock Smash). In the field, it allows a Pokémon to break apart small, cracked rocks. Doing so may reveal items or even certain Pokémon.
The Punk Guy outside the Fossil Lab is looking to trade—items, not Pokémon. He offers a Dive Ball in exchange for a Poké Ball. A Dive Ball acts like a normal Poké Ball, but is more effective against Pokémon found by Surfing or Fishing. This trade can be done once per day.
Serena/Calem is anxious to visit the Fossil Lab, but the Scientists here know little about the Mega Stones. However, they hint that their field assistant, on a dig site in Glittering Cave to the east, may know more.
Visit the blue-roofed house and speak to the female Ace Trainer inside. She asks to see a Pokémon with a Speed of a certain value or higher. Fulfill her request to receive a Health Wing. This can be done once per day.
Hotel Ambrette stands on the smaller southern cliff. Speak to the girl in the lobby to receive TM96 (Nature Power). Nature Power becomes a different move based on the battle's location.
Most of the route is too dangerous for Trainers to cross by themselves, but the friendly resident Rhyhorn is happy to help. Hop onto its back and ride it eastward to Glittering Cave. While mounted, press the A Button to smash the large rocks that litter the path, and the B Button to dismount.
The deep, dark Glittering Cave has many twists and turns, and lots of wild Pokémon. Try not to get lost inside, where Luminous Moss glows an emerald green.
The outer tunnels are very dark, and the path is sometimes blocked by darker shadows that hide wild Pokémon. To reach the basement, go straight ahead at every junction. When in doubt, look for the green crystals that light the way. The first junction leads to a dead-end; the second, to a Hard Stone; and the third, to TM65 (Shadow Claw).
Meet Team Flare
The inner tunnels are easier to navigate. Several members of Team Flare, a stylish but snobby group, are searching the area for Fossils. They do not take kindly to your presence, so be ready to battle!
There are several cracked rocks scattered around the area. These may hide treasures like Hard Stones, Revives, or even Pokémon. Even the occasional Old Amber may appear; when restored, the material inside this ancient tree sap becomes the Rock/FlyingAerodactyl. Return later after defeating the Elite Four, and other Fossil varieties may also appear.
Near the end of the cave, a pair of Team Flare Grunts block the path. Serena/Calem arrives just in time and offers to help take them on. Join up with her/his Espurr, Absol, and second-stage starter Pokémon to clear out these feisty fashionistas.
Speak to the assistant who now stands at the counter to restore any new Fossils. Tyrunt hits hard with biting moves due to its Strong Jaw Ability, while Amaura's Refrigerate Ability treats its Normal-type moves as Ice-type moves. All Pokémon obtained this way will appear at level 20. On the way out, talk to one of the workers to receive a Mega Stone, the Aerodactylite.
The Ambrette Aquarium is a multi-level building on the west side of town. Go downstairs and talk to the Fisherman near the golden Magikarp statue to receive an Old Rod. This low-end fishing rod can hook Pokémon from any body of water, so be sure to try it out everywhere!
There is a Swimmer ♀ to the northeast of the Mago Berry tree. On the way past, she gives you a Dowsing Machine. This handy item can detect any treasure hidden nearby. The beams of colored light point the way; when they cross and turn red, the treasure is one step away!
Cyllage is a small city nestled between the cliffs and the sea, and is surrounded by a steep Bicycle racetrack. Landmarks include the Cyllage Gym and Cycle Shop.
Inside the Pokémon Center, an Ace Trainer named Farris would like to trade. He offers his Steelix, nicknamed Thumper, in exchange for a Luvdisc. Luvdisc are common in these waters, and Steelix can be very effective at the Cyllage Gym.
The Cycle Shop stands just east of the Pokémon Center. Answer the owner's question to receive a choice of either a green or yellow Bicycle!
Next door to the Pokémon Center, a girl offers to give one of your Pokémon a massage, free of charge. This increases the Pokémon's happiness, which is important for certainmoves and evolutions.
Visit the house to the west of the Boutique to take a quiz. The girl asks which Berry cures confusion, and which move causes it. Answer correctly to win three Persim Berries.
Head upstairs and talk to the Maid in the west room to get a Destiny Knot.
Follow the paved road up the cliffside to meet Grant, the local Gym Leader, near the first bend. A Bicycle race just ended, but since you missed it, Grant hands over HM04 (Strength) as a consolation prize. In the field, this lets Pokémon move large boulders, but it cannot be used without the local Gym badge.