Beat Story Mode with Hikari. When done, an option to use her as a system voice should appear in the Option menu. With the "Hikari Voice" option turned on, Hikari serves as the announcer outside of battles.
Kaya's Gallery
Beat Story mode with Kaya.
Misc Gallery 1
Beat Arcade Mode.
Misc Gallery 2
Beat Survival Mode.
Orville's Gallery
Beat Story mode with Orville.
Sheryl's Gallery
Beat Story mode with Sheryl.
Typhon's Gallery
Beat Story mode with Typhon.
Unlock Greed
Beat the game without using continues. Difficulty does not matter.
Unlock Hazama
Progress through story mode without continues on any difficulty. After defeating Greed, Hazama will appear. Defeat him without losing to obtain.
Unlock Laboratory Level
After defeating Hazama, the Laboratory level will be available for selection.