Transformers: Scramble City Activation , mostly referred to as just Scramble City is an episode of The Transformers released as an OVA in Japan on April 1, 1986. It was created as a promotional video for the new line of 'Scramble City' toys and the cassettes were paired with the toy sets. Despite strong belief, it was not meant to introduce Japanese audiences to the new characters from The Transformers: The Movie. Chronologically, it takes place years before the movie, during the early stages of construction on Autobot City.

The Transformers is an American-Japanese animated television series that originally aired from September 17, 1984, to November 11, 1987, in syndication based upon Hasbro and Takara Tomy's Transformers toy line. The first television series in the Transformers franchise, it depicts a war among giant robots that can transform into vehicles and other objects.