After you beat the elite four, wait till the tv in a random person's house flashes. It could be the rooftop sale. Then if it is wait two days and watch the tv again and go to lilycove department store!
Chat with our AI personalities
go to lilycove city go to the department store go to the roof top and talk to the girl
you can go to fortree city then find a house which is sort of sorted out like a mart. talk to them and they will sell you items. another place you can buy items is oon the roof top of the mart in lilycove when the clear out sale.
On the move deleter house at the top right on lilycove city
the one that has the same amount of letters as roof top
it is in the small white house with the lines and the door is open with a red line on top of it.of course you have to beat the champion to ride inside of it.it is cool you have a cabin you can rest in and you can only get inside of it by going to slateport and lilycove city.if you go to battle tower you will not go inside you will only go there really fast like the hm move fly.that is all! oh and the roof is red ALL red with ripples(or you can say lines)on top of it.it is in the far corner in the left side