Rocky VI is a fictional sequel in the Rocky franchise of films. The film was seen at a party in Joe and Bonnie Swanson's home in "Petergeist". This installment has Rocky Balboa, still played by Sylvester Stallone, deciding to challenge a Martian to a boxing match on Mars, to his wife Adrian's disapproval.
At this point Rocky Balboa, the actual sixth installment, had not been released yet. In "Back to the Woods", a poster of Rocky Balboa is seen at the video store.