You get items by completing tasks at the beauty contest (Emera
Square).
There’s currently no tasks available, since the voting has already
started. But you can try it when it’s available again (which will
be on the 14th every month) ^^
I have a Fashion Case, but I don’t know what it does. Does it give
you more accessories? Does it give you items when you don’t have a
task? Or does it let you do tasks? What does it do??
It's basically what lets you participate in the Beauty Contest
(starts 14th of every month). During that time, you can complete
tasks to earn accessories to decorate your pokemon with.
The Supreme Overlord demands attention. All hail the Supreme
Overlord.