Strategy:

Phase 1- he will start by locking up your Magic, your goal is to destroy the dark orbs on his hands, he will counter by sword slashing around himself, wait for him to stop then attack the orbs, once the orbs are destroyed Sora and the rest can use Magic again.

Phase 2- This is when you attack him like crazy, be careful of his head slashes as they will knock you back and take damage.

Phase 3- He will protect himself in a shield, while in this phase he will summon tornadoes, time you dodge out of it as if you don't you will get hit, as well as summoning fire orbs that homes onto Sora, dodge roll them. Best to cast Aero at this time as well. Now for the way to destroy his shield, summon Mushu and continuously fire at his shield, you must be near him for the shield to go down. He will then go back to his Phase 2. Then he'll go to his Phase 1 again and repeat until his HP is at a certain point.

Final Phase-When his HP is at the critical point, he will start spinning around like crazy trying to attack you, the only way to dodge it? Before he comes near you if he is spinning horizontally jump it, when he is spinning vertically just dodge roll it, and attack his magic cancelling orbs. From that he'll go through his Phases from 1(with his crazy spinning move) to 2 to 3 until he dies....