While the Les Pyjamasques pursue Roméo in his Lab, they are locked up there, trapped by a new inventory of the little mad genius depriving them of their power. Pyja-Robot then creates a new vehicle to save them: the Tractotem.
The following characters appeared in the episode "Take Romeo Off The Road":
The second and third were Owlette and Gekko in "Moon Madness."
When Owlette says that they are out of vehicles, she and the other PJ Masks seem to have forgotten about the PJ Rovers. This implies that they didn't need them during this mission, though the short "PJ Racing" seems to show that PJ Robot put the rovers in the PJ Seeker while he was building it.