Drag Normal Pokemon into Top, Right, Bottom, or Left slots of the circle to occupy that slot. Place Shadow Pokemon in the middle (Sprites will snap to proper position if they are touching it). When the Shadow Pokemon in the center has a zero or negative Shadow Gauge, click on it to Purify! Place excess Normal Pokemon above the Release button (Sprites will snap here to when touching the right spot) and then click release to set them free and earn Money (Money does not currently do anything). When a Wild Shadow Pokemon appears, click on the Pokeball under it to capture. Experiment with the placement of Normal Pokemon on the circle to Purify faster!