Mario Kart World has been modified on Nintendo Switch 2 with unofficial racers including Cinnamoroll, Peter Griffin and Hatsune Miku. Security researcher Sammy Hajhamid, known online as pepsipu, shared the footage on October 22, 2026, after developing a software-based Switch 2 exploit named ns2jb.
The videos are not an announcement of Nintendo DLC, and they do not mean that regular players can download a character pack today. This is a technical proof of concept: the researcher has demonstrated a modified version of the Switch 2-exclusive racer, but the method remains complicated and temporary.
Watch the original evidence: pepsipu's Mario Kart World gameplay video on X. The researcher also posted additional video clips and results-screen photos in his account of the exploit. These first-party clips are linked here rather than passed off as official Nintendo trailers.
Which characters are in the Mario Kart World hack?
The researcher named three especially surprising additions: Cinnamoroll from Sanrio, Peter Griffin from Family Guy, and virtual singer Hatsune Miku. His technical post also refers to Red from Angry Birds and includes photographs of the modified game's race results.
None of those characters are confirmed additions to Mario Kart World's official roster. They represent third-party modifications for a demonstration, not licensed Nintendo crossovers or upcoming downloadable content.
The clips and photographs are useful evidence because they show the modified game being played and its results displayed, rather than a purely static mock-up. But GameLogNews has not independently repeated the experiment on Switch 2 hardware.
| What was shown | What it does not prove |
|---|---|
| Custom characters in Mario Kart World gameplay | Official Nintendo roster additions |
| A modified Switch 2 game running in a research setup | A public one-click character installer |
| A system exploit used for game modding | Permanent custom firmware |
| Gameplay and results-screen footage | Safe or supported online multiplayer modding |
How were the custom racers added?
The story starts with the Switch 2 jailbreak, not an ordinary Mario Kart World cheat code. Hajhamid's technical research account describes a chain of software vulnerabilities involving SmileBASIC 4, a programming application originally released on the first Nintendo Switch.
The researcher reports obtaining enough access to run native code in system-module contexts and change game content. The Mario Kart World characters were selected as a playful demonstration of those capabilities.
This distinction matters because Mario Kart World is not presented as the original security vulnerability. It is the game that shows what can be changed after gaining access through other software. A headline suggesting that a player can simply enter a code inside Mario Kart World would be misleading.
The researcher also discussed using OpenAI Codex in the process. He says the core jailbreak required roughly two weeks of substantial research, while the Mario Kart World modification was created in about a day. That does not support claims that a single AI prompt independently hacked the console.
Can Switch 2 owners install these Mario Kart World mods?
There is no confirmed official or consumer-friendly method for doing so. The published ns2jb exploit is described as software-only and tethered, rather than a permanent modification of the console's software.
A tethered exploit must be activated again after the system restarts. It is not equivalent to installing a persistent custom firmware environment or opening a universal mod menu.
The demonstration also depended on a specialized research setup and a particular software entry point. Reports published after the disclosure said that SmileBASIC 4 had been removed from the Nintendo eShop in multiple regions, creating another access obstacle.
Even if more convenient community tools appear later, the current footage alone cannot establish that public mod packs are safe, stable or broadly compatible. Players should be cautious of unrelated download pages claiming an instant Mario Kart World unlock.
Does this mean the whole Switch 2 is cracked?
Not in the sense implied by some viral headlines. Hajhamid describes important capabilities for homebrew research, including game modification and save-file access, but also outlines limitations and remaining areas of investigation.
The demonstrated exploit is not a permanent, all-purpose jailbreak and does not establish full kernel-level control. Neither does a custom character racing in a short video prove that unauthorized game copies or online cheating are suddenly possible without restrictions.
There are practical risks in experimenting with console exploits, including damaged saves, incompatible updates and potential problems with online-service rules. The researcher's write-up documents an experiment; it is not a safety guarantee for players' primary consoles.
Why the Mario Kart World footage matters
Mario Kart World is a flagship Switch 2 exclusive, so seeing characters from unrelated franchises appear in gameplay is a striking visual illustration of how far this particular project has progressed.
It also hints at something familiar from older Nintendo modding communities: custom characters, cosmetic changes and other fan creations. But a demonstration is not a release roadmap. There is currently no confirmed public launch date for a polished Mario Kart World mod manager based on this research.
For broader context, GameLogNews previously covered ns2jb's firmware support, homebrew functions and system-level restrictions. This report focuses on the Mario Kart World gameplay proof itself, its cast of unofficial racers and the difference between a research showcase and software ordinary players can use.
Mario Kart World hack: common questions
Is the footage real?
The researcher posted first-person gameplay videos and photos of a modified version of the game. Those are meaningful primary-source materials, although GameLogNews has not independently tested the exploit.
Are Peter Griffin and Hatsune Miku official DLC?
No. Their appearances in the demonstration are unofficial modifications. There is no Nintendo announcement confirming them as licensed playable racers.
Does the hack survive a Switch 2 restart?
No. The disclosed ns2jb method is tethered, meaning it must be reactivated after restarting the console.
Can players use these characters online?
The published clips do not demonstrate safe, supported online matchmaking with custom racers. No such guarantee should be inferred from the footage.
The bottom line
The Mario Kart World hack is best understood as proof that a researcher could alter a Switch 2-exclusive game, not proof of a finished jailbreak or an imminent crossover announcement. The modified racers are real subjects of the researcher's footage, but the technique remains specialized and temporary.
See the original Mario Kart World gameplay post and the researcher's technical account for the evidence, and keep demonstrated capabilities separate from speculation about future tools.
Confirmed details first, useful context second. This is the quickest path to the source trail and the next pages worth opening.
Source date: October 22, 2026