Similiar to Kurt Zisa, the Phantom can only be accessed once you can reach the End Of The World Location. Return to Neverland and once there talk to Tinkerbell, she will lead you to the location of the fight. With the Phantom, use Donald and Peter Pan as your party members, Peter Pan will be more effective againist the Phantom than Goofy. To prepare equip Stop magic to your Shortcut Magic space. Make sure you have Curaga and Stopga. Upon starting the battle, Immediately start with casting Stop on the Clock Tower. If you do not, The Phantom will cast Death on your characters effectively downing your characters. Once downed you cannot revive your characters. To damage the Phantom, you have to look at the heart's color, if it is Red, cast Firaga, if blue cast Blizzaga and etc. Then once it swifts to an abnormal color strike it with your keyblade. Whenever the Clock Tower runs out of stop, superglide to the Clock Tower and Cast Stopga. Make sure you remember.