Org Moogle

Majority of information taken from Kingdom Hearts-Org Moogle.

Org Moogle Is one of the many Moogles that appear in the Kingdom Hearts Series, but is the only one to actually participate in a large majority of the story.

This particular one seems to be working for Organization XIII willingly, and even dons their trademark black uniform. It is unknown if he is a normal moogle who just works for them, or if he is possibly a Moogle Nobody. This is subject of debate even today.

Kingdom Hearts 358/2 Days
In Kingdom Hearts 358/2 Days, Org Moogle appears as a servant of Organization XIII. He aids the player with Item Synthesis, and allows you to change your Item Synthesis material panels into other panels, such as equipment. You also can purchase King Mickey and Sora for the Multiplayer Mode from it.

At the end of the game, the Moogle flees the Organization with Roxas, saying that he would miss all the munny the boy spends at his shop. What happens to him after the events of Kingdom Hearts: 358/2 Days is largely unknown.

if he is indeed a Nobody, rather than just a normal moogle just working for the Organization, he could arguably be the only surviving member of the Organization.