Disgaea 2: Dark Hero Days Cheats (PSP)

Select, but don't choose, "New Game" at the Title Screen and press the TRIANGLE,
SQUARE, CIRCLE, TRIANGLE, SQUARE, CIRCLE, X to play Axel Mode.

You can view the 7 alternate endings by performing the actions listed below:

Axel's Ending - Lose to Axel

Etna's Ending - Beat Etna in Chapter 3

Laharl's Ending - Beat Laharl in Chapter 11

Mid-Boss Ending - Beat Mid-Boss Before Chapter 4

Tink's Ending - Beat the Final Boss with Tink leveled to 100

Bad Ending Beat the game with more than 10 felonies for Adell / More than 50
Ally-Kills

Worst Ending - Beat the game with more than 99 felonies for Adell / More than 99
Ally-Kills / Ally-Kill Rozalin with Adell