Here's the deal. I started a new file and got all the way to the second Space Paranoids and I notice I was six levels behind the battle level. Do you know any place to level up easily.

Pridelands > Pride Rock > Kings Den > Peak > Level Up

Tried it. My magnet spell is too weak to do anything.

You don't have to use the Magnet spell, you could just fight.
I think you should have Magnega by now.
I'm not really sure where else to suggest training up.

The last upgrade is for beating Xigbar. Can anyone else think of another place?

Welllllll....If you could go to TWTNW you'd level soooo easily, but I gota admit Pridelands oughta be the best place to level. You don't need magnera or magnega just kill kill and kill.

you should go to
the neoseeker hints for kh2 this is what it says.;:

Easy Level Up +++
rating: ---After opening the keyhole in the Pridelands, and obtaining the magnega magic spell, along with the Gullwing keyblade. Go back to the pride lands and enter the peak from the kings den. Make sure the Gullwing keyblade , *Exp Boost is the keyblades bonus*, is equiped and also the Experience boost, and magic lock-on abilities are equipped. Allow yourself to be attacked until your health bar begins blinking red and making that annoying sound... now, dont allow your self to get attacked again, mute ur television, and cast Magnega on the plentyful flying heartless on the peak... about 165 exp points each... when u stop gaining exp.. cast it again.. these heartless drop so much mp balls that you dont have to worry about ur magic points running out.. it would take about 30 minutes of doing this if ur around lvl 50-60 already to get to lvl 99.... Good Luck leveling

You don't really get much out of leveling alone. Go hunt for synthesis materials, instead. You'll level up AND be able to make some good equipment.

However, if you just want pure leveling, the above post describes the best way to go about it. Just remember that your Magic stat needs to be 53 or higher for Magnega to kill them instantly. If it's lower, then add in Thundaga, as well. Equip everyone with Jackpot so that they'll drop enough MP bubbles to refill your MP.

Prie land is the best place to level up. But my personal favorite one is the one in the world there never was and that's after twilight's view.