A researcher’s software-only exploit demonstrates modified Mario Kart World gameplay, although it does not amount to a permanently unlocked console.
A Nintendo Switch 2 jailbreak called ns2jb has offered a glimpse of what unofficial game modifications could look like on Nintendo’s latest console.
Security researcher Sammy Hajhamid, known online as pepsipu, describes the project as a software-only, tethered jailbreak supporting firmware 23.0.1. His published report identifies capabilities including running homebrew software, modifying games and backing up save files. Those are the researcher’s reported results; TechLayers has not independently reproduced them.
SmileBASIC provides an unexpected entry point
Hajhamid’s account describes an entry route through SmileBASIC, programming software originally released for Nintendo Switch. A vulnerability in its interpreter forms part of the exploit chain.
The report also describes AI-assisted development using Codex. Hajhamid clarifies that the jailbreak required roughly two weeks of substantial effort, rather than being completed autonomously from a single instruction.
That distinction matters when assessing the discovery. A successful demonstration shows what a researcher achieved under particular conditions. It does not establish that the process is straightforward, reliable across different setups or ready for everyday use.
Mario Kart World offers a visible demonstration
The accompanying demonstration features modified Mario Kart World gameplay with characters including Peter Griffin, Hatsune Miku and Cinnamoroll. The exploit must be run again after the console restarts.
Custom characters make the result immediately understandable, but the more consequential question is how far the access extends.
Hajhamid describes native-code execution with system-module privileges. That should not be read as a claim of unrestricted control over every security layer of the console.
Why this is different from permanent custom firmware
A temporary exploit and a persistent replacement software environment represent different milestones.
For players, persistence affects convenience: a modification that needs to be reactivated after restarting behaves differently from one that remains available automatically. For developers, the level of access determines which tools and modifications are practical.
The current demonstration therefore supports a narrower conclusion than “the Switch 2 is fully unlocked.” It shows a route to meaningful experimentation, while leaving questions about stability, compatibility and longer-term development.
It also does not establish that every game can be modified in the same way. Each title may present its own technical obstacles, and one successful example cannot answer those questions for an entire library.
What remains unconfirmed
TechLayers has not verified community claims about regional SmileBASIC removals or alternative demo compatibility. Those claims should not be treated as confirmed purchasing guidance.
The next meaningful development would be independently reproduced results and clearer documentation of supported configurations. Until then, ns2jb is best understood as a notable research and modding demonstration, with important limits still attached.
