Nintendo's aggressive stance against emulation is well-documented. The company's legal actions have resulted in significant financial penalties for emulator developers and distributors of piracy tools. In 2024, developers of the Yuzu and Ryujinx Switch emulators faced legal repercussions, with Yuzu settling for $2.4 million and Ryujinx ceasing development following Nintendo's intervention. Even the Dolphin GameCube/Wii emulator faced pressure regarding its Steam release. The case of Gary Bowser, who was ordered to pay $14.5 million for reselling devices that bypassed Nintendo Switch anti-piracy measures, highlights the severity of Nintendo's response.
Recently, a Nintendo patent attorney, Koji Nishiura, shed light on the company's strategy. While emulators themselves aren't inherently illegal, Nishiura clarified that their use can become illegal depending on how they interact with game software. Copying game programs or disabling console security measures constitutes copyright infringement under Japan's Unfair Competition Prevention Act (UCPA). This act, however, primarily applies within Japan, limiting Nintendo's reach internationally.
Nishiura used the Nintendo DS "R4" card as an example—a device that allowed users to play pirated games. Nintendo successfully argued that the R4's manufacturers and resellers violated the UCPA, leading to its ban in 2009. He further emphasized that tools facilitating pirated software downloads within emulators, such as the 3DS "Freeshop" or the Switch "Tinfoil" app, also infringe on copyright laws. Nintendo's lawsuit against Yuzu cited one million pirated copies of The Legend of Zelda: Tears of the Kingdom, highlighting the significant financial losses associated with emulation and piracy.
