During the Siege of Mechanicsburg, Zeetha finds the newly-ascended Heterodyne Agatha working on this steam-powered bit 'o kit here, and immediately drags her away for princess lessons, saying there are now plenty of mechanics for doing this kind of low-level repair. And indeed, in a later scene , we see Krosp operating the now evidently functional walking machine.

The machine's name is Șoarece, which is the Romanian word for "mouse."

A vehicle similar to this, but with the addition of mechanical arms, is featured in the video game Girl Genius and the Rats of Mechanicsburg with Krosp again at the controls.