When it first appeared, it was out of fuel, which led to the ThunderCats acquiring the Thundrilium to run it. Unlike its original series counterpart, it is a very fast vehicle. It also does not appear to have as much armor or firepower. The flashback in Legacy shows that Mum-Ra's forces had many ThunderTanks at their disposal. Presumably, Panthro must have stolen his from within the Black Pyramid after he survived Grune's attack. In New Alliances, the ThunderTank was heavily modified, making it larger, more advanced, and more powerful.