This game was not released outside Japan until 2006, in the form of the Nintendo DS remake.
First appearance of the Moogles.
First appearance of the Job System.
The original game had the starting "default" class for your characters called Onion Knight. In the DS remake this was changed to Freelancer, but they made Onion Knight a secret job.
Additions to the DS remake include Onion Knight being made a secret class, as well as a hidden dungeon and boss. All of these are unlockable through the Mognet feature exclusive to the DS version.