I'm assuming you're talking about the ones with the diagonal arrows. To do those, you simply need to rotate the control pad in the direction listed. For Aura Bolt, for example, you would press down, then slide your thumb to left, creating a circular motion.

If you are talking about the story battle where you need pummel, however, then just select the blitz command, press left-right-left, then press A (or X? depending on the version you're playing).