Originally released for Nintendo Switch on April 28, 2017 as a port of the 2014 Wii U title Mario Kart 8, the Deluxe edition has remained a cornerstone of Nintendo's multiplayer lineup.
The latest update follows other Switch titles updated for next-generation hardware, including Pikmin 3 Deluxe.
The headline change in this patch is the ability to run eight-player split-screen locally on Switch 2.
Players testing the update report that up to eight participants can now race in a single local split-screen session.
Observers also note a clear increase in resolution and overall visual fidelity when comparing Switch 2 gameplay to the original Nintendo Switch.
Rewritten from initial on-the-ground reactions, one straightforward takeaway is that the arrival of an eight-player split-screen option is both unexpected and welcome for fans of local couch multiplayer.
Reporters who captured direct gameplay footage described the presentation as markedly sharper on Switch 2 while confirming that the eight-player split-screen mode runs at 30 frames per second.
The update appears in the game menus on both Switch generations.
On original Nintendo Switch hardware the multiplayer selector exposes a five-to-eight player option visually, but attempting to choose those player counts results in a message indicating the feature is exclusive to Switch 2.
In other words, the option is visible on legacy hardware but locked to next-generation consoles.
Nintendo has distributed numerous game updates for its Switch library in recent years, and this patch continues that trend by enhancing older Switch releases for newer hardware.
For players who prioritize local multiplayer, the Switch 2 implementation of Mario Kart 8 Deluxe offers a substantial quality-of-life improvement: more concurrent local players without needing additional consoles or online lobbies.
This update underscores Nintendo's ongoing support of its back catalog and the enduring relevance of Mario Kart 8 Deluxe in shared, in-person play.
As always, players should check official Nintendo channels and their eShop pages for the latest patch notes and availability details.