When you are in a robattle with any opponent you can defeat them
easily by running behind a bush or something and your opponent should
start shooting at it instead of you! This gives you a chance to power
up your Medaforce(Y+A{hold}). It may take a while for it to power up
and, if your opponent is smart enough, it'll probably go around your
hiding place. If so, just go to another! when your all revved up make
sure you face your opponent and let it fly!(Y+A{again}) Make sure your
opponent is right in front of you when you let it fly cause if your
opponent moves you'll miss and have to rev up all over again!