Question: Which film is a short parody of the 1985 American sports drama film written by Sylvester Stallone: Rocky IV or Rocky VI?

Context articles: Rocky IV
Rocky V
Rocky VI (1986 film)
Rocky Balboa (film)
Rocky
Creed (film)
Rocky (film series)
Anderson v. Stallone
Rocky III
Rocky II

Rocky IV is a 1985 American sports drama film written, directed by, and starring Sylvester Stallone.
 The film co-stars Dolph Lundgren, Burt Young, Talia Shire, Carl Weathers, Tony Burton, Brigitte Nielsen, and Michael Pataki.
 "Rocky IV" remained the highest grossing sports movie for 24 years before it was overtaken by "The Blind Side".
 It is the fourth and most financially successful entry in the "Rocky" film series.
Rocky V is a 1990 American sports drama film.
 It is the fifth film in the "Rocky" series, written by and starring Sylvester Stallone, and co-starring Talia Shire, Stallone's real-life son Sage, and real-life boxer Tommy Morrison, with Morrison in the role of Tommy Gunn, a talented yet raw boxer.
 Sage played Robert Balboa, whose relationship with his famous father is explored.
 After Stallone directed the second through fourth films in the series, "Rocky V" saw the return of John G. Avildsen, whose direction of "Rocky" won him an Academy Award for Best Directing.
Rocky VI is a 1986 nine-minute black-and-white short parody of "Rocky IV" by Finnish director Aki Kaurismäki.
 The film stars Antti Juhani "Silu" Seppälä (Leningrad Cowboys) as Rocky and Sakari Kuosmanen as Igor, his Soviet opponent.
 In the film, the two boxers fight at Töölö Sports Hall in Helsinki.
 The much bigger Igor quickly knocks out Rocky and wins the match.
Rocky Balboa also known as Rocky VI is a 2006 American sports drama film written, directed by, and starring Sylvester Stallone.
 The film, which features Stallone as underdog boxer Rocky Balboa, is the sixth film in the "Rocky" series that began with the Academy Award-winning "Rocky" thirty years earlier in 1976.
 The film portrays an aging Balboa in retirement, a widower living in Philadelphia, and the owner and operator of a local Italian restaurant called "Adrian's," named after his late wife.
Rocky is a 1976 American sports drama film directed by John G. Avildsen and both written by and starring Sylvester Stallone.
 It tells the rags to riches American Dream story of Rocky Balboa, an uneducated but kind-hearted working class Italian-American boxer working as a debt collector for a loan shark in the slums of Philadelphia.
 Rocky starts out as a small-time club fighter, and later gets a shot at the world heavyweight championship.
 The film also stars Talia Shire as Adrian, Burt Young as Adrian's brother Paulie, Burgess Meredith as Rocky's trainer Mickey Goldmill, and Carl Weathers as the champion, Apollo Creed.
Creed is a 2015 American sports drama film directed by Ryan Coogler and written by Coogler and Aaron Covington.
 A spin-off and sequel to the "Rocky" film series, the film stars Michael B. Jordan as Adonis Johnson Creed, Apollo Creed's son, with Sylvester Stallone reprising the role of Rocky Balboa.
 It also features Tessa Thompson, Phylicia Rashād, Tony Bellew and Graham McTavish.
 The film reunites Jordan with "Fruitvale Station" writer/director Coogler, as well as Wood Harris, with whom Jordan had worked on "The Wire".
Rocky is a series of boxing films based on the eponymous, fictional character Rocky Balboa, played in each film by Sylvester Stallone.
 The films by order of release date are: "Rocky" (1976), "Rocky II" (1979), "Rocky III" (1982), "Rocky IV" (1985), "Rocky V" (1990), "Rocky Balboa" (2006) and "Creed" (2015).
 The film series has grossed more than $1.4 billion at the worldwide box office.
Anderson v. Stallone, 11 USPQ2D 1161 (C.D. Cal.
 1989) was a copyright infringement lawsuit against Sylvester Stallone, MGM, and other parties over a script for Stallone's film "Rocky IV".
 This script written by Timothy Anderson was unsolicited and unauthorized, a key fact that led to a decision in favor of the defendants in the lower court and was later resolved in an out - of - court settlement during the pendency of plaintiff's appeal.
Rocky III is a 1982 American sports drama film written, directed by, and starring Sylvester Stallone.
 It is the third installment in the "Rocky" film series, and the second in the franchise to be directed by Stallone.
Rocky II is a 1979 American sports drama film written, directed by, and starring Sylvester Stallone.
 It is the sequel to the 1976 film "Rocky", and was the last installment in the film series that was distributed solely by United Artists.