There are no buttons you can press to improve catch rate.
You press the pause button
It stops the pokemon from evolving
You go in front of it and press the "a" button
press the left button and A when i is.
If you mean where, you press the "x" button. press x then select bag.
u press the b button
press a
no you dont
you press the A button
this strategy has been done for a very long time, but it doesn't work. someone might think it works when they catch the Pokemon, but its always random with a Pokemon. (but its more of a chance if the Pokemon has low health and/or a status problem)
You press the pause button
Press the A button on the pokemon.
you press the button to realease them
You press the save button
Up,Select,B
just go to your tm and press the A button
Tapping the A button has no actual effect on catching Pokemon. This function is not codded into the game so tapping the A button when trying to catch a Pokemon is simply a psychological effect.