How do you defeat ansem in kingdomhearts

Battle one:
Make sure you got lots of hi potions and potions that give you more magic. When ansem says submit super glide away with the o to jump then the square to super glide away. Do that so ansem's dark friend does not grab you. if you do get grabbed by ansem's don't worry just push the triangle button to freeze when the triangle appears on the screen. watch out for those blade attacks. when ansem uses his shield go behind him if you can and hit him. keep hitting ansem whenever you can. save your magic for healing only, so you don't waste magic. you can use your special powers to cause a lot of damage to ansem. sooner or later you will finally defeat ansem.

Battle two:
Ansem is more powerful this time. he does submit more often so remember to super glide away every time ansem says submit. when ansem starts to go very fast super glide out of the way because it takes a lot of health away. too bad your friends can't help you win the battle. when it glows very dark it means ansem is using his worst attack. when a circle goes around you dodge roll out of it, keep doing that successfully and you avoided ansem's worst attack. ansem still uses his shield so try to go behind him and hit him. sooner or later you will beat him. but he still lives and becomes the world of chaos boss.