angel's prayer, you don't get gullwing. in the 1000 heartless battle. you get it AFTER the battle.
you must go to the HB entrance (to the castle) then speak to the YuRiPa fairies. a large chest will appear. after opening it, gullwing is obtained. i know cause i've played that bit myself lol
EDIT: noooooo!!! sorry for double posting...silly mistake...i'm tired right now cause of personal reasons and i make mistakes when tired (lol who doesn't).