Punky Brewster - S02E01 - The K. O. Kid.

On career day at school, teacher Mike Fulton’s friend, boxer Marvelous Marvin Hagler (as himself), comes to Punky’s class and talks about boxing. At lunch time, the school’s most feared bully, Melanie “Moose“ McGurk (Amy Dolan), looks at the lunches of Punky’s friends to take what she wants, but Punky won’t let Moose take hers, so Moose takes Punky into the restroom and beats Punky up. Punky wants to stand up to Moose, so Marvin trains Punky to be a boxer. In the end, Marvin tells Punky that she can’t box very well. Later, Moose and Punky are preparing to fight behind the apartment building. Moose pushes Punky down a couple of times, and Cherie tells Moose that if she fights Punky, Moose will have to fight Cherie as well. And then all the other kids tell Moose that if she fights Cherie, she’ll have to fight all of them. Moose gets nervous and says that she can’t fight everyone at the same time, so Moose runs home and vows to leave Punky alone from now on. Punky and her friends celebrate their victory over Moose.