In battle, attacks like bite, punch, and spit are mapped to your D-pad. Holding down a button for a short time will charge up an attack. Each attack you perform will add a bit to your special move meter, which will unleash a powerful maneuver when full. The stylus will move your creature around the arena a la Phantom Hourglass. Your goal is to drawn the enemy’s health and knock them off the platform, as in Super Smash Bros.

When are we going to stop discussing the same old information!  E3, hurry up we need fresh content!

Source:  IGN