He may be the easiest target in the show, mainly because his rage gets him too unfocused on either getting rid of the Cockroaches.
He sometimes bullies Oggy, either moving him when he is in front of the television, trying to beat Oggy in a race, or going insane. Jack often builds something to try and destroy the Cockroaches, or any other insect that roams Oggy's house, and while he has had some success, most of his plans backfire.
He is focused on getting rid of the Cockroaches or doing something selfish. He is quick-tempered, violent, focused, self-important, sometimes lazy, and a mechanic. Jack can be described as the opposite of Oggy.
