CONTEXT AND LOCATION OF MOGNET CENTRAL
On your way through Esto Gaza to Mount Gulug, deliver a letter to Mogrika causes her to indicate that Mognet is shutting down because of an accident. From this point on, most of the moogles will not have any letters to deliver and will not ask you to deliver any due to problems at the home office, Mognet Central.
You can reach Mognet Central with a light-blue chocobo (REEF chocobo). On the eastern side of an Island, north of the Outer Continent, you can find a crack in the mountain. Feed Choco a Dead Pepper to make him open the crack, revealing Mognet Central.
Inside, the moogle Artemicion confesses that he used too much of a certain "thing" to make his fur glossy, and there was not enough left to use on the machine that keeps Mognet running. HOW TO FIX MOGNET CENTRAL
Leave Mognet Central and travel south to Alexandria. Then speak to Kupo at the bell tower ruins, and he will give you a letter to Atla.
Atla is the moogle at Burmecia. Return there and deliver the letter. Atla wants you to take a letter to Mogryo.
Mogryo is the moogle outside the chocobo farm at the Black Mage Village. Mogryo has a letter for Kumool.
Kumool is the moogle at Ipsen's Castle in the courtyard. Kumool has a letter for Mois.
Mois (who was initially at Ice Cavern) can be found in Qu's Marsh on the Mist Continent, and now stands outside the former entrance to Fossil Roo. Mois has a letter for Noggy.
Noggy is the moogle at Daguerreo. Noggy has a letter for Kupo in Alexandria. Back in the bell tower ruins where we started.
When Kupo reads the letter, you will notice that it says someone in Alexandria has the item needed. Kupo is not any help.
Talk to Ruby in the Alexandria Mini-Theatre, and she immediately hands over some of her hair gel, otherwise known as Superslick.
Return to Mognet Central and hand the item to Artemicion. The Mognet gets back to business, and you recieve a Protect Ring for your help.KUPO NUTS TIP
Each time you deliver a letter during this sequence, the moogles give you a Kupo Nut if you don't already have on in your Key Items inventory. Return to the moogle family at Gizamaluke's Grotto each time you get one, and exchange each Kupo Nut for an item. Is is not necessary, but there are a few elixers in it for you.