Hanagumi Taisen Columns 2 - Platform: Dreamcast

Shadow battle mode:
-------------------
Successfully complete the Shonen Red vs. Benitokage mode as 
Kayama Yuuichi. 

Director's chair mode:
----------------------
Go against one of the hidden characters as a final opponent 
two times in Shonen Red mode. 
The same character will be unlocked in Director's chair mode. 

Puzzle art review option:
-------------------------
Successfully complete Shonen Red vs. Benitokage mode as 
Shinguuji Sakura. Successfully complete Shonen Red and 
Director's Chair modes to unlock the corresponding character's 
puzzle art. Select "Review", then "Puzzle" to view the art. 

Event art review option:
------------------------
Successfully complete Shonen Red vs. Benitokage mode as Kanzaki 
Sumire. Successfully complete story mode to unlock the 
corresponding character's event art. Select "Review", 
then "Event" to view the art. 

Sound review option:
--------------------
Successfully complete Shonen Red vs. Benitokage mode as 
Orihime Soletta. Select "Review", then "Sound" to hear 
the game music. 

Hard difficulty setting:
------------------------
Successfully complete Shonen Red vs. Benitokage mode as 
Maria Tachibana. 

Strongest difficulty setting:
-----------------------------
Successfully complete Shonen Red vs. Benitokage mode as 
Yoneda Ikki. 

Free battle mode:
-----------------
Successfully complete Shonen Red vs. Benitokage mode as 
Li Kohran. 

Panic mode:
-----------
Successfully complete Shonen Red vs. Benitokage mode as 
Kirishima Kanna.