Disgaea - Hour of Darkness cheats and cheat codes for Playstation 2

Unlock Extra Classes
Angel - Female Cleric, Knight and Archer all at level 100 or higher.
Archer - Level 3 or higher in Bow Weapon Mastery.
EDF Soldier - Level 30 or higher Gun Weapon Mastery.
Knight - Female Warrior and Female Mage each at level 10 or higher.
Majin - Male Warrior, Brawler, Ninja, Rogue and Scout all at level 200 or higher.
Ninja - Male Fighter and Male Warrior with a total level of 20 or higher.
Rogue - Both Fighter and Warrior, Males or Females, each at level 5 or higher.
Ronin - Female Warrior and Female Fighter with a total level of 20 or higher.
Scout - 2 Fighters/Warriors, Males or Females, each at level 5 or higher.

Unlock Majin Class
Required each of the following classes, at level 200:
warrior, male brawler, ninja, rogue, and scout.