It is not unusual for Nintendo to often get involved in lawsuits over modified versions of their games or hardware. Now it's Yuzu's turn, a popular emulator that lets you run Switch games on PC. Even in the case of novelties, it only took a few days or weeks for versions playable in this way to appear. According to Nintendo, Yuzu facilitates piracy on a colossal scale.
The lawsuit is ongoing with Tropic Haze, the creators of the emulator. One of the main points is that through Yuzu the player illegally bypasses Nintendo's software encryption. A specific example in this case is Legend of Zelda: Tears of the Kingdom, which was playable via Yuzu less than 2 weeks after its release on Switch. After several pages, the pirated copy was taken down more than a million times and Yuzu's Patreon membership jumped to double its normal status.
Of course, just because a million people downloaded Zelda on PC doesn't mean every single one of them would have bought it on Switch without that option. That doesn't excuse Yuzu and its creator, though, and it was more or less only a matter of time before Nintendo swung into action. Players don't like him much for such actions, but it cannot be denied that he has the right to protect his content. However, the court is still far from delivering its verdict, so the conclusion is not yet clear.
Source: Eurogamer.net