It seems this one is asked and answered like every page of this topic, here's the quote from page 11 that helped me.
The deafult pictures are under the profile bit of the PSS and you tap your image and you can select various images.
Also, people need to stop saying one certain thing is required to get into the Lumiose Boutique, it seems like every time one person says one thing has to be done to get in, someone else says they got in without it. You can get in in many numbers of ways, and you can get in as soon as the blackout is over in Lumiose, I don't know what all the possible ways are, but there are many people who've listed things, one thing I do know is just do stuff around Lumiose and they'll let you in in a bit, talk to people in many buildings, check out cafes, work at the hotel, dine/battle at the restaraunts you can get into, battle people in alleyways, talk to alexa, get a haircut, make a PR video, and probly lots more ways, just do a bunch of the things around Lumiose and they'll let you in eventually. You don't have to do everything, just a lot of things, there are probably even things outside Lumiose like some people say beating the elite four and/or getting fancier clothes elsewhere work too.
There needs to become articles on the main Serebii site about this, because many people keep asking the same questions because they can't find it(myself included).
I am curious if clothing of the player affect the ability to enter the inner area of the lost hotel? I remember the person inside the lost hotel turn me off due to my dressing style... Lol
Also, on this, from what I hear there are a bunch of roller skating moves various skaters around Lumiose teach you and learning them all will gain you entrance, where the leader guy will teach you the last one. There is an article on the main part of Serebii about where to find the skaters that teach moves I think.(I can't post links evidently)
So there's definitely no way to take your hat off... drat! I:
I wish I could unlock more hairstyles early on... I love these long pigtails I saw. ;_; No more buying potions!
It's evidently true since if you could, it'd be by clicking the hat you have equipped and it'd come off, like the accessory does, I heard some people say that works, but it doesn't, not for the hat anyhow. But you should be able to get a new hair style from the stylist by restyling your hair over and over for a bit, it cost me 30k and 20 times in selecting the "Style" option 20 times(1.5k each) and for my male character it unlocked the Medium Perm style, it will probly unlock something for a female trainer too, but I also heard if you have a good style of clothes it'll unlock without multiple restylings, like the Vinyl style from the Lumiose Boutique, wearing 3 items with the same style background on the item label apparently gives you that style, and I heard there are other styles like this too.
Also a good way to get money early on, like before beating elite 4, would be to battle people at the Battle Chateau on Route 7, especially with Amulet Coin or Lucky Incense on, and especially combined with the Prize Money O-Power. If you fight in there a lot you'll get higher level people that give more cash, with Level 3 Prize Money O-Power and Lucky Incense, fighting Marquise/Marchioness level people, I can get like 30-40k one battle in there. But then sometimes I accidently fight Baron/Baroness people and only get like 5k from a battle(with the money ups, it's like 1.2k without). Even without money ups, many battles in there yeild like 1.5k to like 15k, depending on the enemies' level/rank.