Well, if you need to go to sleep and you still need to purify up to 7 pokemon, here's what you do:
1)put one shadow in daycare
2)put 6 shadows on team
2.5)Go to a corner that when you hold down on the joystick, the screen shakes(I used the barrels south of duking's house)
3)unplug controller
4)plug controller in while holding the joystick down
5)release joystick. if you followed step 2.5, you should see your character walking into the corner and the screen will shake
6)wait until the 6th pokemon in your team is ready for purification
7)take all the pokemon to relic stone, including the one in daycare
8(optional))repeat until all shadows are purified.
EDIT: YEAH! RANK CHANGE!