An unnamed cat is a recurring character that often appears in episodes, making minor appearances.
The cat is gray with darker gray stripes on its head, back, legs, and tail. It has green eyes. It has 3 stripes on its head, similar to Catboy. It is unknown if this cat has a name, and whether it is a stray or someone's pet. It is likely a feral cat, as it is always seen outside during the show.
It is shown in several episodes that Catboy likes the cat.