Disgaea 2: Cursed Memories

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

 