Boss battle:
Successfully complete the fairground levels to unlock a new area that allows you to battle previously defeated Bosses.

Play as Mometsuto:
Successfully complete the game to unlock Mometsuto as a playable character.

Picture gallery:
Successfully complete the fairground levels to unlock an option for a picture gallery.

Popka Jump:
To perform a "POPKA JUMP" simply plug in another controller on the second controller slot.While playing as "KLONOA",press "START BUTTON" on the second controller and "POPKA" will appear;when you press the "SQUARE BUTTON" on the second controller "POPKA" will push "KLONOA" up in the air making him jump three times higher than his normal jump.Note:doing this will knock off "POPKA" for a little while and you won't be able to make another "POPKA JUMP" until he recovers.To make "POPKA" disappear just press "START BUTTON" again on the second controller