He is the most knowledgeable of the trio when it comes to technology e.g., constructing a robotic and alligator-like mouse in 'Mouseagator' and 'Mouse Attack'. Joey is incontestably the cleverest member of the trio who frequently cooks up various stratagems.

His end goal is said to hold sway over Oggy's household for himself and 'his people.' It is also noted to canvass how victimized cockroaches will stand up and be emancipated. Despite these traits, according to some official profiles, he would produce an incredibly emotive speech concerning the ultimate fate of all cockroaches if he could talk.

Joey is additionally said to metaphorically view things in black-and-white. He has even physically harmed them, particularly when they defy or irritate him. In the cartoon's more recent seasons, Joey is sometimes shown to act harsher toward Dee Dee and Marky. He is additionally revengeful and bad-tempered, sometimes seeking vengeance on Oggy out of anger merely for rubbing him the wrong way. A good example of this is in 'Don't Rock the Cradle' and 'Oggy the Babysitter' when he attempted to kidnap a baby for ransom, also displaying his avarice. In addition, there is practically nothing he will not do to get his way. He is quite devious possessing no qualms toward cheating ('Sports Fans') and using manipulation (e.g., the aforementioned 'Fake News' which also shows that he knows how to edit videos). On a few cases, he has even sent at least one of his fellow roaches into action, so he would not have to go himself (e.g., 'Mouseagator' and 'Mouse Attack'). Joey is a selfish, vicious and highly sadistic individual.

Oggy and the cockroaches