Can anyone give me hints to beat Ansem 2?

Do you mean when you fight Ansem alone with Sora?
First off you should be a high level, 80s or 90s.
Have plenty of Elixers with you. Save your items to heal Sora. The first time you fight him ( with Goofy and Donald) don't waste your items. After that fight heal yourself completely with items from the menu.
During the fight use Areoga( the wind spell) to defend yourself. DO NOT let your health get low. Heal constantly. Equip Thunder Areo and Cure to your shortcut.
Attack with Ragonoth and the other attack that tuns you gold and invicible.

Good luck to you!!! XP

Cureative items are a must--Elixirs in particular. the last ansem battle was a slugfest, this one requires patience, like the second Riku battle.

Go defensive when Ansem's familiar guards him or latchs on to Sora, and use the glide ability to stay out of the way when Ansem hurtles around the fight arena.

When the familiar starts leeching Sora,Ansem will protect himself with a force field,But it is possible to brake through it with the Ragnarok combo.Try that for big damage.

Late in the battle, the familiar will seperate again and shoot dark energy out of the ground, use the dodge roll to avoid these.

Hope it helps

No Way! You do not have to be 80's or 90's. I beat him lvl 63. He is easy if you use the olympia blade. Use only magic to heal and you should win.

He isn't so hard that you need to be in the 80's or 90's. That is sephiroth, you can beat him by using cureaga and be about level 60 to 65. I beat him at level 60 with oblivion keyblade. Ultama keyblade works better, but it is not necesary to spend all that time to get it.