Zexion is a manipulative man who uses his wits in order to make things the way he wants them to. He doesn't fight at all, but rather relies on his intelligence. He also has a strange ability of being able to track someone down by their particular scent, and is able to tell when they are dead because of it.
In Chain of Memories, Zexion appeared in Riku's story along with a few other members of the Organization. After three members of the Organization are killed: Larxene, Lexaeus and Marluxia, Zexion attempted to destroy Riku. In order to bring him down, Zexion attempted to use his wits to make Riku believe that he was only being used by the darkness. Doing this, he disguised himself as Sora. Nothing that Zexion did, however, had any effect on the boy.
For awhile, Zexion was fine, however, Axel quickly brought in Riku Replica and tried to get him to destroy Zexion, which he did easily.
that was from this one website i found sayin dat Zexion Was killed or destroyed.
if this is true y do ppl say he escaped or anything
i dno if this is false and i did beat KH:COM both stories but i forgot most of it like sora did