Unlock Kakuzu and Hidan. After unlocking Kakuzu, enter Training mode to practice his skills. To use Kakuzu's hidden moves, press A then Up or Down. Do not press A + Up or A + Down. One of Kakuzu's demons will appear on the shoulder of his robe and spit out fire (Down) or shoot a burst of wind upward (Up). If the moves are not timed correctly, one of Kakuzu's demons will shoot lightning forward to stun the enemy (A).