Thinking about pj masks again and I'm just realizing just how different Pharoah Boy is from the other villains. Firstly there's the fact that as far as i can tell he never goes for teamups instead opting to simply plot against everyone heros and villains alike. Then there's how out of place he is in the timeline, not only is from ancient egypt but nearly non of his schemes involve modern elements (ie the chariot, mountain takeover, sphinx, ect).
The biggest thing separating PB from the other villains in my opinion though is his lack of a sidekick. Every other villain has a sidekick or on rare occasions (literally just the wolfies and speedy twins) work as a team of villains. Even the more manipulative or less social characters like Octobella have some sort of companion to aid in their evil schemes. Munki does work alone as well but he's less of a villain and more of a nuisance (sorry munki gu fans). It's not even that PB couldn't get someone to work with him, realistically the writers could've him some sort of pet like a scarab or even an army of mummies but nope Pharoah is almost always fighting alone.
Maybe that's why in the Bastet into ep the pjs were so quick to assume she would be on PB's side because apart from him no other villain fights completely alone.