Nintendo Switch Update 20.1.0: New NSO Launch Sound and More

Nintendo has rolled out a new system update for the Switch just ahead of the highly anticipated release of the Switch 2. The latest firmware, version 20.1.0, was released on May 27, 2025, and while the official patch notes are brief, they highlight several subtle but meaningful changes that align with the upcoming console’s design direction.

What's New in Switch System Update Ver. 20.1.0?

The most notable updates include visual adjustments to the Parental Control settings, a refreshed sound effect when launching Nintendo Switch Online (NSO) from the Home Menu, and general system stability improvements. According to early impressions, the new NSO launch sound is more energetic—possibly hinting at what Switch 2 users will hear when accessing the service on the new console.

X user @Nexusvoyager shared a side-by-side audio comparison of the old and new sounds, confirming that the change is both intentional and likely indicative of the overall tone Nintendo is aiming for with the next generation of its hybrid console. Additionally, the same user noted updated navigation sounds and a redesigned NSO app interface, which appears to mirror the UI expected on the Switch 2.

Before and after the update pic.twitter.com/HC71TFztS9
— The Ashen Nexus. (@Nexusvoyager) May 28, 2025

After a relaunch the app completely changed its ui pic.twitter.com/h07hoSOOOt
— The Ashen Nexus. (@Nexusvoyager) May 28, 2025

Theme Updates and Dark Mode Support

Renowned Switch firmware analyst @OatmealDome discovered additional behind-the-scenes tweaks tied to system themes. In the 20.1.0 update, “Basic White” and “Basic Black” have been renamed to “Basic Light” and “Basic Dark,” respectively. More importantly, the NSO app now supports the Basic Dark theme, enhancing consistency across system visuals.

[Nintendo Switch Firmware Update]

• The "Basic White" and "Basic Black" themes were renamed to "Basic Light" and "Basic Dark".
• The Nintendo Switch Online applet now supports the Basic Dark theme.

pic.twitter.com/BoeR4YbBD4
— OatmealDome (@OatmealDome) May 28, 2025

System Transfer Readiness

For those planning to upgrade to the Switch 2, this update ensures compatibility when performing local system transfers. Users must update their current Switch to version 20.1.0 before initiating a transfer to the new console—a clear sign that Nintendo is preparing the ecosystem for a seamless transition between generations.

Switch 2 Launch Nears

With the Switch 2 set to launch on June 5, anticipation continues to build. Recently, IGN reported an incident involving someone who obtained a Switch 2 unit ahead of schedule. Unfortunately, the console couldn’t be used without the mandatory day-one patch, and the video was quickly taken down due to copyright claims.

In our hands-on preview, we’ve already experienced Mario Kart World on the Switch 2 and learned about performance enhancements for backward-compatible titles, variable refresh rate support conditions, and the new GameChat feature, which requires phone number verification. Despite overwhelming pre-order demand, Nintendo of America President Doug Bowser has assured fans that supply will meet consumer needs throughout the holiday season.

Official Patch Notes – Nintendo Switch System Update Ver. 20.1.0 (Released May 27, 2025)

• Visual updates have been made to the Parental Control settings.
• The sound that plays when Nintendo Switch Online is launched from the HOME Menu has been changed.
• General system stability improvements to enhance the user's experience.