When encountering a Pokemon you intend to catch, weaken it in whatever mannerpossible (HP reduction, status infliction, etc.), then throw a regular Poke Ball. When the screen zooms in on the Pokemon, trace counter-clockwise circles around the Poke Ball symbol with your stylus on the touch screen. Try to not trace your circles too fast or too slow but at a good median speed. This will either make the contained Pokemon roll more times or get captured in one roll. Note: This method doesn't always work but simply make captures easier with ordinary Poke Balls.