If you touch the yellow, glowing orbs they will teleport you to the top of the wheel, bringing you face to face with Ghadius' now massive visage. You cannot damage Ghadius whilst up here, instead fighting against the wheels rotation and attempting to reach the teleport, dodging the laser beams that Ghadius will fire at you (In the English Wii version, he'll say "Perfect!" each time). Keep in mind these beams create shockwaves you shall need to leap over. Afterwards, Ghadius will change to his second phase ("Let's see how you like this!")