Continuity mistake: In the last fight scene, particularly during the close-ups of the fighters, you can clearly see in numerous shots that the auditorium seats are empty. This is contrasted with the earlier shots where it is jam packed as the fighters are entering the ring.
Continuity mistake: In the scene where Adrian is waiting for Rocky as he is returning home, she is going to surprise him with a gift, Butkus the dog. Rocky is standing about 25 feet from her so he has a good angle to see the entire porch. When she presents him with the dog, he acts surprised like he didn't see him on the side of the cement porch. Plus she is holding the dog leash in her hand. Rocky would have seen the dog immediately.Louis
Other mistake: When Adrian is in Rocky's apartment, he tells her that he no longer has a phone. Several scenes later when Rocky confronts Paulie for bringing reporters to the meat company, he tells Paulie that he should have called him first or left a message.