still... i use this button trick to increase the catching rate of my pokemon (also known as the master ball trick...) by 5 its like ultraballs catching rate is 2.0 + (the msterball trick) = 5 so its easier to catch
1: launch a ball then press select after .4 seconds press a (dont release select)
2: when you see the flying ball opens, press up when the ball closes, press b
3: There you have it the increased catching rate makes pokemon easier to catch ^_^
*NOTE: I use this to my gb advance sp and nintendo ds this works i tell you