By far the easiest mini-game trophy. In Kamurocho there is a batting cage in the top left part of the map. Go to the 3rd (or 4th) door in the building to start a hard game. Now, all you need to do is move the crosshair onto two panels at the edges. Hold it steady as the ball comes and hit the ball with the right timing to hit two panels at once. You get 20 attempts per each game in case you miss it.