Nintendo has expanded its copyright enforcement against Nintendo Switch modification tools and emulators, with four DMCA complaints affecting 217 GitHub repositories associated with Picofly modchip firmware, Citron Neo and Yuzu. GitHub disabled 215 repositories across two project networks, while the owners of two additional Yuzu repositories removed their source code.
The complaints, dated November 6, 2026, are documented in GitHub’s public Digital Millennium Copyright Act (DMCA) archive. They cover 144 repositories associated with Switch modchip firmware, 71 repositories connected to the Citron Neo emulator and two separate Yuzu repositories.
The largest enforcement action targeted Ansem-SoD/Picofly, a repository distributing firmware for hardware used to modify the original Nintendo Switch. GitHub confirmed that it disabled the entire network of 144 repositories, including the original project and its forks.
Nintendo’s complaint identifies firmware associated with Picofly, SX Core, SX Lite and HWFLY modchips. These devices can bypass the original Switch’s startup security protections, allowing modified consoles to execute software that Nintendo does not officially authorize.
Picofly uses an inexpensive RP2040-based microcontroller and a technique known as voltage glitching. The modchip is soldered into a compatible Switch and introduces a precisely timed electrical disturbance during startup, interfering with the console’s security verification process.
This functionality can enable homebrew applications, alternative operating systems and game modifications. It can also facilitate unauthorized copies of commercial Switch games, which forms the basis of Nintendo’s complaint.
Nintendo argues that distributing firmware intended to defeat the console’s technological protection measures violates the DMCA’s anti-circumvention provisions. Its filing specifically challenges the distribution of the firmware rather than alleging that the affected repositories directly hosted copyrighted game files.
GitHub’s enforcement extended beyond the original Picofly repository because Nintendo alleged that all or most of its forks contained similarly infringing material. Since the network exceeded 100 repositories, GitHub processed the complaint against the entire group.
The removal also affects access to firmware for other supported modchips, including HWFLY and the earlier Team-Xecuter hardware. Nintendo referenced the United States criminal proceedings involving Team-Xecuter in support of its anti-circumvention argument.
The latest complaints extend beyond the removal of 144 Switch modchip firmware repositories, with separate enforcement affecting software designed to emulate Nintendo Switch games.
A second complaint targeted the Citron Neo emulator, resulting in the disabling of 71 GitHub repositories. The affected network included the citron-neo/emulator parent repository and associated forks.
GitHub explained that the Citron Neo project was actively being forked when it received the complaint. Because Nintendo had identified the known forks, the platform applied the takedown to the entire 71-repository network.
Nintendo’s Citron Neo complaint focuses on the emulator’s alleged circumvention of Switch game encryption. The company argues that the software uses unauthorized copies of Nintendo’s proprietary cryptographic keys to decrypt and run Switch games outside its officially supported hardware.
Two additional complaints targeted Yuzu repositories maintained under the IpwnedU account. These contained copies of the emulator’s mainline and Android source code.
Unlike the Picofly and Citron Neo networks, the two Yuzu repositories remain accessible on GitHub. However, their owner removed the source code and cleared the repositories’ commit histories. Their remaining README files direct visitors to archived copies elsewhere.
Yuzu’s original development ended in March 2024 following a legal settlement between Nintendo and developer Tropic Haze. The settlement included a $2.4 million payment to Nintendo and an agreement to discontinue the emulator.
The November complaints represent another stage in Nintendo’s ongoing efforts to restrict the distribution of software and hardware tools capable of bypassing Switch security systems.
For Switch owners using existing modifications, the GitHub removals do not automatically disable installed modchips or erase firmware already stored on their consoles. However, losing access to repositories can make obtaining firmware updates, reflashing hardware or preparing new installations more difficult.
The restrictions are not comprehensive. Other GitHub repositories containing Picofly and HWFLY firmware remained accessible following the reported takedowns, indicating that the notices did not eliminate every available copy.
GitHub also provided affected repository owners with information about submitting DMCA counter-notices. The takedowns represent GitHub’s response to Nintendo’s legal complaints, not a court judgment establishing that every affected firmware project infringes copyright law.
The enforcement concerns the original Nintendo Switch’s modification ecosystem and Switch emulation software. It is separate from the reported Switch 2 firmware 23.5.0 jailbreak restrictions, which involve security changes to Nintendo’s newer console.
For now, the practical effect is reduced GitHub availability for the targeted firmware and emulator projects, while previously installed modifications remain unaffected by the repository removals themselves.
