Wave Gigs is Demyx's Limit Break. It causes Demyx to play his sitar. By pressing the in time to Demyx's strumming (indicated by his body flashing), Demyx will unleash columns of water that deal water damage to enemies, with successive presses steadily increasing the number and strength of the columns, up to four. Upon a misstep, the columns reset back to one. Meanwhile, Demyx's movement speed is reduced to a slow march. During the Final Limit, Demyx's attacks power up, releasing large balls of water that explode and knock enemies back, and at maximum power, Demyx himself generates a large explosion of water with a forceful strum upon each press.
Learning Wave Gigs
Kingdom Hearts 358/2 Days