(SPOILER)
The anaclets arenīt totally true because FalīCie is corrupt.

The game log isnīt definitive.
"Barthandalus" dies but not his bird which is his true form.
I am sure he managed to manipulate the Sanctum to evacuate citizens to Pulse before he creates the illusion that it is being destroyed.
An holographic ceiling exists over Pulse which creates this illusion.


Care to explain your theory?
Itīs explained on the "Orphans" thread.
Will bring it here on a nutshell.