Go to the Lilycove counter, save the game and expire the rest of the (real) day with pokemon in hand or a stowage box. Proceed to play the lottery and check to see if the numbers on hte lottery match any of your pokemon's original (not current) trainer ID numbers. If not, you reset and reload the save.

Otherwise, the number of lottery digits matching your pokemon trainer IDs grabs you a prize depending on the matches:3rd Prize (2 Correct Digits) - ooo## = PP up
2nd Prize (3 Correct Digits) - oo### = Exp. Share
1st Prize (4 Correct Digits) - o#### = Max Revive
Big Prize (5 Correct Digits) - ##### = Master ball

Of course the more trainer ID's you have ( Gotten by trading pokemon you caught for ones other players have caught) the more likely you will get and faster you will get the masterball Prize). This is of course, the non-glitch method of gaining PP and master balls.