The Robot is Romeo's self-created personal servant and the main villain sidekick of the PJ Masks series. His most notable ability is his very long and stretchy arms which are often used to quickly get Romeo from place to place. It is around 3-4 times larger than Romeo. It is one of the few inventions made by Romeo that has the ability to speak.
Robot can stretch his arms and legs. Unlike his book counterpart, Robot is able to speak, developed by Romeo. He can shoot shrink rays out of one of his fingers, as seen in the episode "Nobody's Sidekick", which causes anything to instantly shrink. However, Robot uses this ability very rarely. Robot can also shoot force field rays out of his eye which he uses to capture his opponents inside a force field bubble, as seen in the episode "Wolfy Powers".
Robot is very respectful and performs tasks for Romeo such as bringing him from place-to-place. Similar to how Luna Girl is with her moths, Romeo tends to mistreat him and acts stubborn towards his warnings about the PJ Masks although he does sometimes treat Robot with kindness. It is possible that he is Romeo's only friend.