Complete the indicated task to unlock the special illustrations found in the "Gallery" menu.

Special Illustration 1: Already unlocked.
Special Illustration 2 through 5: Complete Survival level 500.
Special Illustration 6: Unlock all EX characters.
Special Illustration 7: Unlock all Gold/Shadow characters.
Special Illustration 8: Unlock all arcade ending art.
Special Illustration 9: Unlock all EX ending art.