Crysallise

Crysallise, originally known as Lulu Season, is a secret boss in Kingdom Hearts: Foul Remembrance. She can only be challenged after all the world are sealed EXCEPT The Ruins That Never Were and Holy Arxaith. She is found when you go to the HQ and talk to Gakupo. He says that there has been a malfunctioning program that needs to be fixed or deleted.