In the DS version at least it is unlocked at the Earth Crystal along with the other Earth Crystal jobs which are Summoner, Magus, Devout, Ninja, and Sage. In the NES version it is unlocked at the Water Crystal.
Freelancer, Warrior, Monk, White Mage, Black Mage, Red Mage, Thief, Ranger,Scholar, Geomancer, Dragoon, Viking, Dark Knight, Evoker, Bard, Black Belt, Devout, Magus, Summoner, Sage, Ninja, Onion Knight
Final-Fantasy 12 Zodiac Job System part 49. The Behemoth King!
In my opinion its the ninja
Dietmund in lower Jeuno
Level the job up!
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all you got to do is master two thieve abilities
Exploring The Whole Place Should do the job.
On one character, raise the Black Mage and White Mage Jobs to level 5, and raise the Mystic and Time Mage Jobs to level 4. This should unlock the Arithmetician Job.
That would be a Red Mage, a common job class in the Final Fantasy series. They're known as a jack-of-all trades, so they are capable of using black and white magic as well as swords. However, they will most likely not be able to use these abilities as well as the other classes that specialize in each.
Rapid Fire is a Lvl 4 ability of the Ranger job class. So, level up the Ranger job class
The player must master 2 illusionist A abilities to unlock the Alchemist job class.