Quote Originally Posted by TouchandFeel View Post
Not exactly. The classic Final Fantasy class, Blue Mage, allowed you to learn monster abilities by having them be used on a member of the party and then use them as spells or special abilities. They didn't really turn into the monsters.
I believe he's talking about the Morpher job from Final Fantasy Tactic: Advanced. You can capture monsters as the Hunter job, then raise them but also obtain a monster soul. Then equip that soul as the Morpher job and you can transform into that monster and use its abilities in battle.