They don't die, they just fade. Anyway, no, not all of them die. Roxas merges back with Sora at the end of Kingdom Hearts 2. The others all fade one way or another.
Yep. All of 'em.
The members of Organization XIII are:XemnasXigbarXaldinVexenLexaeusZexionSaïxAxelDemyxLuxordMarluxiaLarxeneRoxasXion~By MapleLeaf~
it is still called organization xiii
No, Riku was never in Organization XIII. He wore the cloak because he wanted to hide the darkness in his heart.
In the first game Ansem dies and in the second one all the organization XIII guys die
lexaeus
Organization XIII's members definitely existed at this point, but the name 'Organization XIII' probably wasn't created until the time of Kingdom Hearts Chain of Memories when Roxas joined, making thirteen members altogether. We know, because of the events in Kingdom Hearts Birth by Sleep, that the members of the organization were mobilized, but "Organization XIII" in specific might not have been established.
The eldest member of the Organization is Vexen, the Chilly Academic.
The human forms of Organization XIII's members appear in Kingdom Hearts: Birth by Sleep for the PSP.
Organization XIII might have used it as a home base to regroup, rest, and practice in the case of Kingdom Hearts 358/2 Days.
There has not yet been a Henry XIII.
Zexion is Organization XIII's Number VI The Cloak Schemer