This is really handy if you need to increase your levels in forms. You need to have unlocked Tron's world, Space Paranoids, although it does matter which part, as long as you can access his world thorugh the computer in Hollow Bastion.

Go to the Corridors in Hollow Bastion/Radient Gardens, and there's a square room, with three corridors leading off. One of which will take you to a door to Ansem's Study. Here, three Crimson Jazz enemies will appear for you to fight, in the square.

Change into the form you want to level up and defeat them. This works better for Master of Valor. (this won't work for Final, as you have to kill nobodies for exp.). Anyway, defeat as many enemies as you can before all of your drive runs to zero.

When the drive meter is around gauge 1 and you are no where near the door to Ansem's study, then you need to start heading there, as quick as possible.

Go through the portal via the computer, and your drive gauge is as good as new. You can now train in Space Paranoids, as long as you return to a computer to be transported again to the normal world.

If you fail to do this, you will lose the Maz drive. However don't worry. Find a save point, and go to the world map. Go to the Olympus Colisseum, and talk to Panic. He'll tell you about the tornaments, and that you can enter as many times as you like. Enter any one of them.

Before the battling actually starts (if you enter the Pain and Panic Cup, the first attack is dealt straight away by Donald, who delivers a blizzard attack, i think.) hit Start, and select quit. You'll arrive back in the underworld. Your drive gauge is now Max.

A fun but useless thing you can do then if you've got wisdom level 3,and the ability quick run (lvl.1/2/3) is you can skate across the pool of green water in the underworld, in normal form. This is pointless, but somehow amusing.

Another way of increasing the form levels is to go to Port Royal. This is better on the second time because the enemies are higher levels, hencemore exp. Go to Isla De Meurta, or the harbour or The ship graveyard.

At any point, transform into the form you wish to make stronger and battle any enemies you meet. However, don't venture too far from the Black Pearl. When your drive gauge is low (about 1ish if you're far) start to head back to the Black Pearl. This works well with Master, because in this form you have no one in your party, just you. As soon as you are on the ship again, your Drive Gauge will be max. Repeat this until you aquire the level you want.

Anti form, if you didn't know, is a form totally random. It comes up at any point as soon as you have Valor. It's freaky and annoying, but powerful and quite cool. You can't improve your health, or level up this form. There isn't much point to it really. It merely throws you off, and makes you lo ok like a Heartless. You are all black and smoking.

Anyway, if this happens, you must leave the world and enroll yourself in the cup at the Olympus Colusseum. Quit and then go back to your form training. Keep doing this until you are at the desired level.