Disgaea 2 - Dark Hero Days - Platform: Sony PSP

Axel (Akutare) mode:
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At the main menu, highlight the "New Game" option, then press Triangle, Square, 
Circle, Triangle, Square, Circle, X to unlock Axel (Akutare) mode. In the 
Japanese version, highlight the "New Game" option at the main menu, then press 
Triangle, Square, X, Triangle, Square, X, Circle.


Magichange:
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Successfully complete Axel mode, then start a new game session in Adell mode to 
unlock Magichange.


Infinite Magichange turns:
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Throw a character back in the base panel to get unlimited turns for Magichange.


Bonus characters:
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Successfully complete the indicated task to unlock the corresponding character:

Asagi: Unlock Asagi's map with 33 felonies, 100 mana, then defeat her, and 
pass her bill as a senator in a New Game+. 
Asagi (humanoid): Raise Asagi's level to 2,000, and pass her bill as a 
senator. 
Flonne: Unlock Extra Stage 8 with 40 hours or more of game play time. Then 
during Episodes 12-13, defeat Flonne. 
Gordon: Unlock Extra Stage 4, and pass Gordon's bill after completing it. 
Laharl: Unlock Flonne, then pass Flonne's bill as a senator, and successfully 
complete Extra Stage 9. 
Mao: Unlock Mao's stage after unlocking Mr. Champloo and Raspberyl. 
Marjoly: Unlock Extra Stage 7 with 99 felones and 1,500 mana. Defeat Marjoly, 
then pass her bill. 
Mr. Champloo: Unlock Mr. Champloo's stage with 50 hours or more of game play 
time and completing Axel mode. 
Preire: Unlock Extra Stage 6 with 66 felonies and 100 mana. Then, defeat 
Priere during Episode 1-9, and pass her bill. 
Prism Red: Pass the five Prism Rangers bills when Adell is a Sentator, then 
pass his bill a second time. 
Raspberyl: Unlock Raspberyl's stage after completing thirty Dark Sun stages 
and unlocking Mr. Champloo. 
Sabre Kitties: Successfully complete Axel mode 1-2. 
Vyers (Mid-Boss): Unlock Extra Stage 5 with 20 hours of game play time and 400 
mana. Successfully complete Vyers' stage in Episode 1-9. Reach the stage again 
during the next playthrough, and pass his bill. 
Zetta: Unlock Extra Stage 11 with ten Dark Sun stages completed and 3,000 
mana. Successfully complete the map, then pass Zetta's bill.