On his own, PJ Robot decides to use the Tractotem against the Mecanolab to stop Romeo but he causes serious damage to the latter, which threatens to crash in the city. PJ Robot and Romeo must work together to stop it.
The following characters appeared in the episode "PJ Robot Vs Romeo":
With it, he uses it to talk to PJ Robot as they battle with each other at the beginning of the episode and to tell the PJ Masks that he is just collecting the fallen pieces to make his factory even stronger at the end of the episode.
Catboy (in the Owl-Glider), Owlette and Gekko didn't assist PJ Robot for the first time, as they were too busy collecting falling junk from the factory while PJ Robot and Romeo worked together to fix it.
Despite this, they (the PJs) still use their usual catchphrase instead of saying "PJ Masks, all shout 'hooray'! 'Cause in the night, PJ Robot saved the day!" like they did in "Big Sister Motsuki".
Also, PJ Robot saves the day by himself (with a bit of help from a villain) for the second time, the first being in the aforementioned episode.
Romeo narrates an episode title for the fourth time.