The Disgaea D2 Additional Trophy 4 Add-on for Disgaea D2: A Brighter Darkness (EU) has 3 trophies - 3 bronze.
Requirement: Make DLC character Ash join your party. You'll go no further! For her sake, I will not fail!
Requirement: Make DLC character Marona join your party. Valiant Phantoms, aid me in battle! Chartreuse Gale!
Requirement: Make DLC character Metallia join your party. I will cover the world with swamps!