1.Press L+R at the inventry screen, then you'll get 493 Masterballs.
2.Set Masterballs' quantity to the Pokemon number you want.
3.Hold L and encounter Pokemon.
i.e. When you want Mew,discard 342Masterballs.(493-342=151)
Pokemon list (In Japanese)
[ ±¾Ìû×îºóÓÉ Sata ÓÚ 2007-8-19 12:17 PM ±à¼ ] ×÷Õß: Sata ʱ¼ä: 2007-8-19 12:14