Until the end of the game, if the Skylanders talks to Auric whilst in the Ruins, he will simply tell you to come back later. Once the player has completed story mode, Auric will give the Skylanders a large amount of treasure.
Auric also played a minor role in identifying the "black pearl" the Clam-tron 4000 created as a bomb. He appeared at the party being held at the end of the game.
Auric accompanied the Skylander after they made a deal with him that they could buy a ship engine from him for just one gold coin, in exchange for Auric to set up shop on the Dread-Yacht. Afterwards, he sets up shops in the levels that follow, providing the Skylander with hats, Skystones cards, Luck-O-Tron Bulbs (Luck-O-Tron Wheel Slots), charms, and more.
Auric is the chemical name given to an ion of Gold (Au3+), a reference to the fact that gold is most often used as a currency in most role playing games.
Auric's role in providing the Skylander with items, and setting up shops in the following levels after Junkyard Isles, is similar to Moneybags's role in Spyro: A Hero's Tail in providing Spyro helpful items throughout the levels.