Anti-form & Final Form

[Savior of Dawn]

I noticed this relation when I was attempting to level up Master Form, and got Anti.

Now, we all know you can't get Anti-form from Final Form, yes? Well, I noticed on Sora's pants in Anti-form, they have the same symbol!

So, perhaps Anti-form is Final Form using the power of darkness? Obviously they're related in some fashion.

 

[Kairi's Heart]

oh thats so cool I never noticed that nice, good job!

 

[Honky Sam]

Nice....

 

[Darkened Heart]

Interesting theory. Perhaps, since Final Form unleashes the true might of the Keyblade, it is the very opposite of Anti Form.

To expand on your theory, in short: Final Form is derived from the Light, Anti Form is the result of Darkness.