![Supper Mario Broth on Twitter: "A prototype version of Super Mario Kart contains a debug menu with some standard options and one separated from the rest, called simply "MARIO". Selecting "MARIO" will Supper Mario Broth on Twitter: "A prototype version of Super Mario Kart contains a debug menu with some standard options and one separated from the rest, called simply "MARIO". Selecting "MARIO" will](https://pbs.twimg.com/media/FNwHJNlXIAM8Lgr.png)
Supper Mario Broth on Twitter: "A prototype version of Super Mario Kart contains a debug menu with some standard options and one separated from the rest, called simply "MARIO". Selecting "MARIO" will
![Alleged Nintendo "gigaleak" reveals eye-opening prototypes for Yoshi's Island, Super Mario Kart, Star Fox 2 and more | Eurogamer.net Alleged Nintendo "gigaleak" reveals eye-opening prototypes for Yoshi's Island, Super Mario Kart, Star Fox 2 and more | Eurogamer.net](https://assets.reedpopcdn.com/alleged-nintendo-gigaleak-reveals-eye-opening-prototypes-for-yoshis-island-super-mario-kart-star-fox-2-and-more-1595685607258.jpg/BROK/thumbnail/1200x1200/quality/100/alleged-nintendo-gigaleak-reveals-eye-opening-prototypes-for-yoshis-island-super-mario-kart-star-fox-2-and-more-1595685607258.jpg)
Alleged Nintendo "gigaleak" reveals eye-opening prototypes for Yoshi's Island, Super Mario Kart, Star Fox 2 and more | Eurogamer.net
![Super Mario Kart began life as an F-Zero multiplayer prototype, reveals Retro Gamer interview | GamesRadar+ Super Mario Kart began life as an F-Zero multiplayer prototype, reveals Retro Gamer interview | GamesRadar+](https://cdn.mos.cms.futurecdn.net/9GFwDGYGEdXF3SgdBXXnUC.jpg)
Super Mario Kart began life as an F-Zero multiplayer prototype, reveals Retro Gamer interview | GamesRadar+
![Nintendo Player – A Not-For-Profit Classic Gaming Fansite - Super Mario Kart (Prototype, Super Nintendo) Nintendo Player – A Not-For-Profit Classic Gaming Fansite - Super Mario Kart (Prototype, Super Nintendo)](http://nintendoplayer.com/prototypes/smk/screens/Super%20Mario%20Kart%20(USA)008%20(2).png)
Nintendo Player – A Not-For-Profit Classic Gaming Fansite - Super Mario Kart (Prototype, Super Nintendo)
![Discover Many Discarded Features in the Circuit Editor of the Super Mario Kart Prototype - theGeek.games Discover Many Discarded Features in the Circuit Editor of the Super Mario Kart Prototype - theGeek.games](https://thegeek.games/wp-content/uploads/2021/08/Super_Mario_Kart_-_North_American_Cover.png.jpg)
Discover Many Discarded Features in the Circuit Editor of the Super Mario Kart Prototype - theGeek.games
![Nintendo Wire on Twitter: "Mario Kart is the latest series to get some major prototype leaks, from an almost complete but unused city track in Mario Kart 64 to some unusual early Nintendo Wire on Twitter: "Mario Kart is the latest series to get some major prototype leaks, from an almost complete but unused city track in Mario Kart 64 to some unusual early](https://pbs.twimg.com/media/EeH2h0YWsAEH_uQ.png)
Nintendo Wire on Twitter: "Mario Kart is the latest series to get some major prototype leaks, from an almost complete but unused city track in Mario Kart 64 to some unusual early
![Nintendo Player – A Not-For-Profit Classic Gaming Fansite - Super Mario Kart (Prototype, Super Nintendo) Nintendo Player – A Not-For-Profit Classic Gaming Fansite - Super Mario Kart (Prototype, Super Nintendo)](http://nintendoplayer.com/prototypes/smk/screens/Super%20Mario%20Kart%20(USA)041.png)