You won't be able to trade any pokemon from quartz.
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On progress update, I've made all desert routes and whiteclay town have a 1/3 chance of having a sandstormy weather every time you enter them, and made most maps of the city. Now I gotta do people scripts and... dance!
In the belly dance dance hall of Whiteclay town you can talk to the dance master and she'll ask you to dance with her. Á la Zelda Oracle of Ages style, she'll teach you the moves first, then do some sequences you'll have to memorize and then repeat. You'll have to do a minimum of steps in each sequence. Once you pass the dancing test, you can battle her and get a Mirage Glass, which will open the door of the mirage tower in the desert.