The stickers automatically appear when an AR Emoji is created. And that happens in the camera app when you select "AR Emoji mode" and tap on "Create My Emoji." The phone does all off the heavy lifting including the creation of the AR Emoji (which can be tweaked by you), and the creation of the stickers. The stickers can be added into a message directly from the handset's QWERTY keyboard, or by using 'copy and paste' to place them into a message.
And while no one can accuse Samsung of running a Mickey Mouse operation, the feature also allows users to create AR Emoji of certain Disney characters. Last week, Samsung added The Incredibles to a list that currently includes Mickey Mouse, Minnie Mouse, and Donald Duck.