valor form

Can someone tell me exactly what it does and how to use it?

sora combines with goofie, gains another keyblade, and, while he cannot use magic, has better much strenght :D

So how do you do it? Does it come up in the command window?

When your drive gauge is 3 or above you can use it by going to "Drive" in your attack menu and selecting "Valor."

For general, easy to answer questions such as this, just use the General Kingdom Hearts II Discussion Thread that is already running:

http://forums.eyesonff.com/showthread.php?t=81846