This precedent generally holds: . As one analysis noted, "if there is no previously copyrighted code like BIOS included... then that emulator is presumed to be fully legal". The problem arises when users pair that emulator with illegally obtained ROMs.
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The crackdown has only intensified. In February 2026, Nintendo issued a sweeping DMCA notice to GitHub, targeting over a dozen Switch emulator repositories—including branches and forks of the now-defunct Yuzu and Ryujinx. Nintendo's legal argument is that these programs are "circumvention devices" designed to bypass the technological protection measures (TPM) of the Switch, violating the DMCA's anti-circumvention provisions. This precedent generally holds: