Spider Clank

Also known as the "crab monster" clank, the Spider Clank was a rogue clank wandering the wastelands. It was "one of Von Bode's little toys," although we don't know who Von Bode was. It is the clank that attacked Master Payne's Circus of Adventure, causing the death of Madame Olga. Despite having just been turned away by the Circus, Agatha came running when she heard the commotion, and used her Death Ray to destroy it.

Out of gratitude for her help, the Circus allowed Agatha to travel with them, dressing Olga's charred body in Agatha's things in order to fool Baron Klaus Wulfenbach into thinking it was Agatha who had died.