In other entries they're just not that memorable to me. I've played III - XII (minus XI), Dirge of Cerberus, Kingdom Hearts, and Crystal Defenders and besides IX the only game that I really associate moogles with is XII. It's been quite a while since I played XII, but they had some kind of presence in the game. They were used as NPCs sparingly with Montblanc being the only one I can really remember. V had them as a race too, but they were stuck to one village in the game that you spent little time in. I can't remember if they were people in III, but that's about it. Other games just had them as summons, easter eggs, or not at all. Kingdom Hearts have them too, but just in the synthesis shop, but that's okay it's a crossover series and moogles should take the forefront in the series they originate from.

Final Fantasy IX made them stand out by having them as save points, having them show up frequently throughout the world, and making them feel like people by giving them personalities and jobs. The Mognet sidequest being the method of bringing this aspect out.