Pokémon X and Y/Parfum Palace

'''Parfum Palace, a grand building fit for a king. Built by the ruler of Kalos 300 years ago after a massive war, it is now a museum of Kalos's rich cultural history. The owner of the palace presumably has the Poké Flute, which is what you're here for, but it doesn't hurt to explore the palace and all the sights it has to offer.'''

Outside the palace
As you enter the clearing from Route 6, you'll notice two other paths leading back from where you came. These paths take you to the wilder parts of Route 6, where the grass grows as tall as trainers. You can certainly explore these regions, but for now your main priority is getting the Poké Flute. Also in this clearing is a Photo Spot, where you can make Phil take a picture of you in front of the grant gate of the palace. As you walk along the path, talk to the first female tourist to get an Oran Berry! You should be quite familiar with what berries do right now, and the Oran Berry in particular automatically heals your Pokémon if you let them hold it. Go to the top left corner of this clearing to find an Ether.

Now it's time to enter Parfum Palace. Talk to the butler standing at the gate. He will charge you a rather hefty fee of 1000 to gain entry, but he will still let you enter out of pity if you somehow lack the money. The entrance fee only needs to be paid once, and you can freely enter and exit the palace from here on out. Without further ado, walk up the stone path to the door of the Parfum Palace.

Palace interior
As soon as the enter, you'll find the owner preoccupied with his own problems. His beloved Furfrou has gone missing, and you must help find it if you're ever going to get the Poké Flute from him. There's no rush to get it, so you can just explore the palace for all it has to offer. The second door from the left of the first floor hallway leads to the king's bedroom. You can actually sleep in the bed to heal your Pokémon!

Go to the second floor and you will find a magnificent hallway of mirrors. Go into the first room from the left and you can get an Amulet Coin from the fireplace. This held item will double the prize money you get from winning trainer battles, definitely an item worth putting on your Pokémon. If you check the bookshelves, you can also find information about a Lucario that went through an odd transformation, possibly a clue about Mage Evolution?

Once you've explored the entire palace, go down to the first floor and go through the large middle door to enter the palace's enormous garden.