Kingdom Hearts II KH2FM "that guy who stronger than sephiroth"

(Or how his name...)
So...what i must do to unlock this battle?
He is looks like all from gold...("secret video" of KH2)
I saw at YT what he is from "dark portal" at cornestone...?

 

Since I don't have Final Mix, I wouldn't know if it was an unlockable battle or not, but the guy in gold is the Lingering Will, the lost mind of Terra in his armor.

A portal to the Badlands appears in the Cornerstone of Light in Disney Castle, and maybe it's there after you beat Timeless River, or after you unlock The World That Never Was, I can't be sure though.

 

I believe you have to unlock the first secret ending "Gathering" and then you unlock his portal ^^

 

I beated the game already,kill 4 mushroom xD,and some org.13 members,ut how unlock secret video?
P.S.
If you don't have FMix,why you don't downoad it?And,what a difference of KH2FM and KH2FM+?

 

KH2:FM+ was the name of the package that included KH2:FM and RE:CoM, though it is often said to just mean KH2:FM.

As for getting to fight Lingering Will/Lingering Sentiment/Enigmatic Soldier, you need to complete all worlds and have a cleared save file.

 

You mean...journal 100%?
P.S.
WOW!Right now I found a strange room with 13 doors, where each is an enemy, one of the organization, each can fight,and I fight with Roxas!He have health...like 120% of sephiroth.
Defeated Roxas,figthing axel,location:figth axel and roxas(2 keyblades).Fire floor decreasing HP...he(Axel) have more HP but lower defense!
Doing all with master form!=)
Axel was tough,but he defeated!=) I go figth "xeganort"
Defeated from 2nd try,with final form...

 

No, you actually couldn't yet if you wanted to. that would include Lingering Will. You just need to fully complete each world's plotline, right on down to fighting with Sephiroth.

What difficulty are you on BTW?

 

What is the BTW?

 

BTW just means "By the way"

 

Ok,it is hard...Not critical!=)

 

Ok, you're on proud. You should be fine. So when you go through the Journal for each world you want a Mickey head for the second item in each one. If you already have that you may need to beat the game again (though I don't remember that being necessary)

 

You mean...I need 1-2 mickey head in each world?

I am looking at secret video right now!=)

YES!!i defeated him!!3rd try,final form+anti form!!tnx for all help!=)

 

Defeat all 13 weapon Silhouette