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Crazy Kong is a Nintendo-licensed adaptation of Donkey Kong created in September 1981 by Falcon for the Japanese market as the unexpected popularity of the original game led to a shortage of arcade cabinets. 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 on January 29, 1982. Like Donkey Kong, this game faced competition from unofficial bootlegs from both arcade clones and home ports. The title Crazy Kong is never used in official Donkey Kong home ports as it has been retired by Nintendo after outliving its usefulness. The game has never been re-released officially in any form.
Crazy Kong Part II
Falcon addressed several of the problems by releasing Crazy Kong Part II in the same year. Here are the differences from above:
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.