"the Curse of Truckenstein" is the 87th episode of the series and the 5th(a) of Season 4 of Robotboy. In this episode, when the gang are preparing to watch a Monster-Truck presentation it gets interrupted by the most dangerous Monster-Truck of them all; Truckenstein. And then suddenly the cursed Monster-Truck sucks Gus into his entrance and possesses him to be his driver.