Someone at 2ch.net found the following information about Kingdom Hearts II: Final Mix in Another Report:

Unlocking The Extended Secret Ending

Beginner Mode: There’s no way of unlocking it.
Standard Mode: Beat every Organization Battle, complete every world, complete Jiminy’s Journal in full, and defeat the Enigmatic Soldier (Secret Boss).
Proud Mode: Beat every Organization Battle, complete every world, and defeat the Enigmatic Soldier (Secret Boss).
Critical Mode: Complete every world (after previously being told we had to defeat the Enigmatic Soldier no matter what, it appears that isn’t the case).

(The original Secret Ending may be unlocked with other easier conditions, but that’s currently unknown.)

Limit Form

Limit Form can be gained in the second visit to Twilight Town. Similar to the other Forms, “Auto Limit” is also gained at the same time, and the abilities unique to the Form are ‘Dodge Roll’, ‘Ragnarok’, and ‘Strike Raid’.

Organization XIII Mushroom Heartless

The Organization XIII Mushroom Heartless only appear in Hollow Bastion and Twilight Town. If all of them are defeated, a new Keyblade is obtained.

Critical Mode Details

- ‘Experience Zero’, ‘Reaction Improvement’, and an extra ‘Finishing Plus’ can only be obtained in Critical Mode.
- You start with MP Haste on.
- Some enemies’ attacks can kill in one hit if precautions are not taken.

Also, more cutscenes of Re: Chain of Memories have appeared on KH-Vids.net in This News Post.