YOU WILL NEED:
LOTS OF MONEY IN POKEMON
STRONG(but not TOO strong) POKEMON

U WILL LOSE LOTS OF POKEMON MONEY BUT U WILL RECEIVE PRIZE MONEY!
YOUR POKEMON WILL GAIN EXP THROUGH THIS!!!

Step 1: Before Being Allowed Into the Boutique

RESTAURANT LE NAH

The boutique is VERY expensive but they have stylish outfits. If they don't allow you in, saying your "not stylish enough" then you have to go to Restaurant Le Nah in South Boulevard near a woman in orange standing in front of a cab. The Restaurant has 1 star on it but if you can't find it, go to a cab, click "fine dining" and then click "restaurant Le Nah."

Step 2: Restaurant Le Nah

This place will let you gain Exp, receive tiny mushrooms, and will let you have 3 Double Battles. DONT WORRY they heal your pokemon while you "eat." THIS PLACE COSTS $2,700!

Step 3: Restaurant Le Yeah

After you go to Restaurant Le Nah, you need to go to Restaurant Le Yeah. This place is located on Autumnal Avenue. It's the place with 2 stars on it. They will give you an option of triple battling or rotation battling. THEY COST $13,500! You will receive Big Mushrooms here.

Step 4: Restaurant Le Wow

Next, you have to go to Restaurant Le Wow! This place is located on Hibernal Avenue. They have 3 stars! This place costs $100,000! They give you the options of Double battle, Triple battle, or Rotation Battle!

Step 5: Still Won't Let U In?

If the boutique people still don't let you in then you have to try working at Hotel Richissime! DONT WORRY, THE HOTEL IS NEAR RESTAURANT LE WOW!(it's the opposite way from the tower) If you work perfectly AND get a praise from the people working with you, you get $2,000! The more you work there, the higher the payment!(4-6 times working= higher payment)

Step 6: Already Tried Working at the Hotel But They Still Won't Let U In?!

If they still won't let you in after you worked at the Hotel, try exploring Lumiose City!(the cafés, the station, the Looker Bureau, the stand, the restaurants, etc.) THE PIC IS THE MAP OF LUMIOSE CITY

Step 7: Extra Features That Came With Entering Boutique Couture

After they allow you to shop at Boutique Couture, you'll also be able to change your hair into even more new styles and stuff.... You should also try going to the PR video place and talking to the guy at the right counter. There might be more that I didn't add but you should try checking them out yourself since it's about the experience!(wow I sound like a wise old dude)