Formchange is a mechanic introduced in Kingdom Hearts III. Formchange allows Sora to change his abilities or the form of his Keyblade. Formchanges are triggered via Situation Command after achieving sufficient damage with a Keyblade. Certain Keyblades will also have the ability to Formchange a second time. Formchange is a mechanic that borrows cosmetic and technical concepts from Command Styles and Drive Forms both, and allows Sora to manipulate his Keyblade's form similar to the wielders from Kingdom Hearts Birth by Sleep.
Unlike Drive Forms, Formchanges do not carry over into cutscenes.
The concept of having the Keyblade transformed into different forms has existed since Kingdom Hearts II Final Mix with the Lingering Will being able to transform the Ends of the Earth Keyblade into different forms. The idea was incorporate into Kingdom Hearts III's gameplay to show the growth of Sora's skill as he trained and become a more masterful Keyblade wielder.
Guardian Form and Strike Form were originally referred to as Guard Form (ガードフォーム, Gādo Fōmu?) and Power Form (パワーフォーム, Pawā Fōmu?) in early gameplay notes and were considered Drive Forms before the formal introduction of the Formchange concept.
List of Forms and Formchanges
Second Form allows Sora to access his abilities from previous adventures, similar to Limit Form. Sora wears his Kingdom Hearts II outfit. It is triggered by the Kingdom Key, Starlight, Midnight Blue, Phantom Green, and Dawn Till Dusk. The Keyblade used determines the third level finisher: Starlight uses a finisher called "Ancient Light", which draws enemies in before releasing several Keyblades made of light to strike them, while the others use Ars Arcanum instead.
Rage Form allows Sora to channel his darkness in desperate circumstances. Sora takes on the appearance of a Pureblood Heartless, similar to AntiForm. It has a chance of being triggered when Sora reaches critical health, regardless of current Keyblade. After using the command Risk Charge, Sora will gain extra strength at the expense of half his current health.
Ultimate Form unleashes the ultimate power of the Keyblade. Sora wears white clothes reminiscent of Final Form. Triggered by Ultima Weapon. While attacking, Sora will summon a variety of swords that will surround him and will be used in finishers, he uses a pattern of magic and uses the symbolism of chains during some attacks.
Kingdom Hearts II Final Mix
Kingdom Hearts Birth by Sleep
Kingdom Hearts III
In addition to Sora's various forms, Lea can transform his Keyblade Flame Liberator into his Eternal Flames Chakrams. Young Xehanort turns his Keyblade into a whip during the fight against him, Xemnas, and Ansem, Seeker of Darkness.
Notes and references