it probably already has. remember in that one episode where brian finds out he has a son? well, when chris shows brian's son his room, the evil monkey comes out and does the finger pointing thing, then brian's son goes up and punches it over and over and over again, and eventually kills it.
it does. i cant remember which episode but chris says something about it and then the evil monkey leans though the banister on the stairs and does the evil point.
there were plenty of episodes where monkey left closet hannah banana, the episode where brians long Lost son killed the monkey, and what do u know monkey is back again this time in tom tuckers sons room monkey always comes back