Anti-Form is a Drive Form in KH2, and it appears at 'random' throughout the game when you drive into a Form, using Valor Form, Wisdom, and Master increases the chances of it appearing, while Final Form decreases it's chances a lot. if you play Final Mix, the Keyblade Two Become One/Two Across only allows you to drive into Final or Anti Form. Anti is very fast, but weak. It has a few magic attack finishers and makes it impossible to Heal or do Reaction Commands. it's valuable for some things, and utterly useless for others. Hope that helps. :Dover a year ago