Hurricane Period is a brand new ability for Sora in the Final Mix games of the KH and KH2. Sora somersaults 1080 in the air as an air combo finisher, fixing the flaws of his basic air combo finisher in order to hit higher and lower enemies out of reach.
In Final Mix 1, the move had Sora fall as normal while flipping, and KH: 2 Final Mix + has him staying in midair while energy surrounds his keyblade, it costs 3 AP to equip.(Though it is already available with Limit Form in FM +.)