How do you beat xemnas on proud mode on kingdom hearts 2

well, defeat him like you would on any other mode, he's just a bit faster and stronger. I'd level up a little more, then try. If he's too hard, just switch your mode in settings or whatever. just read the instruction book your game came with to find out how to switch it... anyways, I'll give you all the info I know on how to defeat him, since i defeated him twice.

BEFORE YOU DO ANYTHING, SAVE AT THE ALTAR OF NAUGHT! once you get to the battle report, you CANNOT save. they do that so you can always defeat him again.

These are the abilities you must equip: Action: All except Guard, Counterguard, Explosion, Trinity Limit and Horizontal Slash. Growth: High Jump LVL 2 or higher, Aerial Dodge LVL 2 or Higher and Glide can any level. Support: Scan (Optional), Air Combo Plus (Both), Combo Plus (Both), Combo Boost, Air Combo Boost, MP Rage (Both), MP Haste, MP Hastega (From Ultima Weapon), Berserk Charge (Optional), Second Chance (Optional) and Once More (Optional).

Use Ethers, Curaga, Reflega and Thundaga to shortcut. Reflega to X, because it's probably easiest to use in X-button.

Try always to save Ethers. Try to use very little magic and limits. You can also Auto-reload Ethers or Don't equip Any action abilities, save for Cure Potion, Eternal Session, Dark Shield and Dark Aura and of course your abilities.

Now, here's the hard parts. when sora is captured by xemnas, you must become RIKU. remember to watch Riku's health, cause his is much smaller, and sora is only removed of 1hp each second. not much, right? remember to pay attention, because a clone of xemnas will try to reflect you away, which if hit will take a lot of hp away from riku. use dark aura on the clones whenever they get too close. just "S" swerve until you get to xemnas, then press Triangle.

there is also a time when he surrounds you with THOUSANDS of lazers!!! you have to set the controller in your lap or on another flat surfae and mash the X and triangle buttons. the faster you mash, the faster its over and the more HP you save. after that, he becomes a little bit harder. Hit him whenever you can, and run in a big, wide circle for a while, then strike.

if your mp is empty and you are dangerously low, run in a big circle until it re loads. remember riku can always help with His special abilities.

Hope this helped! Keep on gamin'!