Xion (Boss) is a boss that you fight near the end of Kingdom Hearts: 358/2 Days.
 First Form
Xion's first boss form. Her first special attack is Sonic Blade.
 Second Form
Xion's second boss form. Her special attack is now Ragnarok.
 Third Form
Xion's third boss form. In this form, she uses Ars Arcanum.
 Final Form
Xion's fourth and final form, which bears a good resemblance to Sora. In this form, she gains a entirely new moveset and uses a Limit Break.
Related ThreadsBoss help plz? - last post by @ Oct 26, 2009
what is the last boss! - last post by @ May 29, 2010