Zeg is a denizen of the underground world of Underzone. The worm surfaced on one occasion but found himself being harassed by a trio of bullies for being different. Zeg was rescued by Sonic the Hedgehog but accidentally led Miles "Tails" Prower to his secret home. As Tails was no longer allowed to leave, Zeg happily took Tails on a tour of his new home but was soon subjected to a direct spray of poison gas from a leak in the wall. Zeg survived and helped evacuate the area as Tails cleared up the spill. He then prevented any further danger by putting a cork in the gap.