Disgaea 2 Hints, Tips

Extra Classes:

Note that just having the mastery isnt enough you'll then have to petition the Dark Assembly with the appropriate bill to be able to create them.

Archer - Have someone with a level 5 bow mastery
Beast Tamer - Successfully capture a monster
Chaos Soldier - Finish the game once
Samurai - Have someone with a level 5 sword mastery
Gunner - Have someone with a level 5 gun mastery
Heavy Knight - Have someone with a level 3 spear mastery
Magic Knight - Have someone with a level 3 sword and staff mastery
Male Ninja - Have someone with a level 5 fist and sword mastery
Female Ninja - Have someone with a level 5 fist and staff mastery

Unlock Akutare Ending:

Get Defeated by Akutare

Unlock Bad Ending:

Have Adel 10+ Previous Offense, Killed Ally 50+ Times, Then Finish The Game

Unlock Etna Ending:

Defeat Etna in Chapter 3

Unlock Laharl Ending:

Defeat Laharl in Chapter 11

Unlock Middle Boss:

Ending Defeat Mid-Boss Before Chapter 4

Unlock Tink Ending:

Defeat Final Boss with Lvl. 1000 Tink

Unlock Worst:

Ending Have Adel 99+ Previous Offense, Killed Ally 99+ Times, and Rossary Formarly Dead.

Unlock Flonne:

Play 40 hours to unlock "I want to fight an Overlord!" proposal. Pass it to unlock Extra stage 8 "In Holt Village" Beat it and she'll join you.

Unlock Laharl:

After getting Flonne, have Adell become a senator. Attend Dark Assembly and pass Flonne's "Summon Laharl!!" proposal. Beat Extra stage 9.

Bad Ending:

Have Adel 10+ Previous Offense, Killed Ally 50+ Times, Then Finish The Game.