Crazy Kong

Crazy Kong is a Nintendo-licensed adaptation of Donkey Kong created in 1981 by Falcon for non-US markets. The gameplay remains relatively unchanged; however, the sprites suffered enough changes to be differentiated from the original. Nintendo had only authorized for the game to be distributed inside Japan, but Falcon breached this agreement by exporting the game into the US, which prompted Nintendo to terminate the license agreement in 1982.

Elcon Industries
On June 30, 1982, Nintendo of America filled a complaint toward Elcon Industries Inc., an arcade hardware manufacturer based in Michigan that sold Crazy Kong boards. The complaint alleged that the licensing agreement with Falcon explicitly forbade the manufacturing or export of Crazy Kong outside Japan. The case was taken to the United States District Court for the Eastern District of Michigan, which quickly ruled in favor of Nintendo.