Lewis Galoob Toys, Inc. v. Nintendo of America, Inc. is a 1992 legal case where the Ninth Circuit Court of Appeals concluded that there was no copyright infringement made by the Game Genie, a video game accessory that could alter the output of games for the Nintendo Entertainment System. The court determined that the Galoob did not violate Nintendo's exclusive right to make derivative works of their games, because the Game Genie did not create a new permanent work. The court also found that the alterations produced by the Game Genie qualified as non-commercial fair use, and none of the alterations were supplanting demand for Nintendo's games.