A month-old stream has led to recent accusations that Nintendo is using generative AI in Mario Kart World’s development. “AI-generated images were not used in the development of Mario Kart World,” Nintendo told Eurogamer after rumors began swirling. The controversy began after some viewers of a Mario Kart World stream from last month began to voice suspicion over some of the art on display. That lines up with previous comments from Nintendo’s Shigeru Miyamoto, who has disavowed the use of generative AI entirely. The questionable Mario Kart World art could just be slightly wonky human-made placeholders intended to be cleaned up before release.