Tritranium

Tritranium is an object that appears in the Sonic Underground television series. It is a fuel source for Sleepers.

Description
Tritranium is a rare golden stone used to fuel Sleepers, and can be found in the Badland Mines. It is the only fuel source capable of doing so, as it can be compressed without exploding.

History
Tritranium was in use by Dr. Robotnik as a fuel unit for his Sleepers. Eventually, however, he ran out of Tritranium and had to go to the Badland Mines in order to find more, but upon retrieving said Tritranium, the Sonic Underground destroyed his reserves in order to prevent him from making more Sleepers.