Shalour City Pokémon
  • Mantyke - Rare, Surfing
  • Tentacool - Common, Surfing
Shalour City Fishing
  • Alomomola - Common (Super Rod)
  • Chinchou - Common (Good Rod)
  • Lanturn - Rare (Super Rod)
  • Luvdisc - Common (Old Rod)
  • Octillery - Common (Super Rod)
  • Remoraid - Common (Good Rod)
After a prolonged dip into Reflection Cave, you've emerged in the south end of Shalour City, home to yet another Pokémon Gym. Ready to put your skills to the test yet again? Or would you care to have a teensy look around first and see what the city has to offer? 
  • The Pokémon Center is near the exit to Reflection Cave. Mr. Bonding is in here, for once, and he has the Critical O-Power for you. Also here, working the desk at the Poké Mart, is a vendor who will sell you five rather nifty TMs for Dig, Poison Jab, Safeguard, Hail, and Sandstorm.
  • To the right of the Pokémon Center is a house with a Scientist in residence. He'll check your Coastal Pokédex and give you an Eviolite if you at least 40 Pokémon in your Pokédex. 
  • To the left of the Pokémon Center are two houses. In the first is an old woman who will give you a Soothe Bell if your lead Pokémon likes you. In the second is a man who will give Pokémon that adore you Footprint Ribbons. Also in the second house is a woman who will give you five Stardusts if you have a Flying- or Psychic-type Pokémon in your team.
  • In the northeast of Shalour City is a Hiker who will block your path. He says he's looking for something. Remember where he is so you can come back after you've beaten the gym.
  • Go north through Shalour City to watch a cut scene with Tierno and Trevor. When the path splits, take a left. At the top of the stairs you'll find a house. Inside is a guy who will trade a Leppa Berry for a Sitrus Berry. Also up here is the local Pokémon Gym, which is currently closed.
  • Head down to the sand that leads north. Tierno will rush in and give you an Intriguing Stone.
  • On the edge of the water to the north is a Photo Spot. Head directly west of it to find several small rocks on the opposite side of the beach. The rock firmly planted in the sand contains a Stardust.
  • Cross to the northern beach that borders with the Tower of Mastery. To the right of the entry arch, hidden in a clump of rocks, is a Max Ether. Run up to the entrance itself and check the bushes to the right to find a Max Repel.

Tower of Mastery

Enter the door at the base of the enormous Lucario statue. The whole group of rivals will gather during the cut scene that follows, and you'll learn a bit more about Mega Evolution. Calem / Serena is waiting inside, and they want to challenge you to a battle.

Pokémon Trainer Calem / Serena
  • Meowstic, level 28
  • Absol, level 28
  • Quilladin / Braixen / Frogadier, level 30
Reward: 3,000 P

Not that bad a fight, despite being a rival battle. Meowstic can be a little annoying, but it's fragile enough to go down fairly easily. Absol is strong but also a tad fragile, and the starter, though generally a bit more robust, is straightforward in its attacks. Just don't use your own starter and you'll be fine.

To unlock Mega Evolution you first need to trounce Korrina's gym, back in Shalour City. Heal up and head for the Shalour City Gym. Be sure to check behind the bench by the gym's entrance for a hidden X Sp. Atk before entering.

Shalour City Gym

What a surprise, the gym is an enormous skating rink. No fancy layouts here - all you have to do is chase after the four Pokémon trainers as they skate around, bump into them, and beat them in combat. Each trainer you beat will raise a section of platform leading to the middle, where your final challenge awaits. Straightforward and simple, and the kind of brawl you'd expect in a Fighting-type gym. Flying- and Psychic-type attacks will get you through your competitors with a minimum of fuss.

Roller Skater Dash
  • Heracross, level 30
Reward: 960 P

Roller Skater Kate
  • Meditite, level 28
  • Mienfoo, level 28
Reward: 896 P

Roller Skater Rolanda
  • Sawk, level 27
  • Hariyama, level 29
Reward: 928 P

Roller Skater Shun
  • Pancham, level 27
  • Throh, level 27
  • Machoke, level 27
Reward: 864 P

Once you've beaten all three, grind the rails to the central platform. Korrina, your infrequent companion on your trip up to this point, will make an appearance and challenge you to a one-on-one.

Leader Korrina
  • Mienfoo, level 29
  • Machoke, level 28
  • Hawlucha, level 32
Reward: 5,120 P, TM 98

Expecting Lucario? None to be seen in this battle, and that's probably to your advantage. Mienfoo is set up to hurt Psychic-type Pokémon, while Machoke can surprise Flying-types. Hawlucha is just strong in general. Nevertheless, a swift Pokémon that capitalizes on their weaknesses should have the edge, as none of them are amazingly resilient. Just make sure you wipe out Hawlucha quickly. It likes to use Hone Claws, and can quickly grow to a one-hit KO machine if not stopped.

Beating Korrina will earn you the Rumble Badge, which allows you to control Pokémon up to level 50, as well as use the HM Surf outside of battle. (Guess what you're getting soon.) Korrina will also shell out TM98 Power-Up Punch

That's that. Gym defeated... but Korrina isn't. She wants to fight atop the Tower of Mastery. You're finally about to see what Mega Evolution can do. Before you make the trip north, however, return to the Hiker who was blocking your path earlier, in the northeast of Shalour City. He'll swap your Intriguing Stone for a Sun Stone