Overview

This has been an idea of mine for a while. A Peloton bike but instead of paying $50 a month to get yelled at why not spend $0 a month to yell at people! Imagine Mario kart but in order to accelerate you need to pedal a bike. I swear this has been done before but for games that aren't fun. Mario Kart is inherently fun so adding the pedaling controls to doesn't damper the experience. In fact I have had people tell me that they wish this was in gyms. From my experience I can tell you I will never use the gym's boring bike when I can do this in my own apartment. They way it works is really simple: the program detects how your leg-strap Joy-Con is moving. Considering that your legs always move in the same patter on the bike the program uses the Joy-con's data to determine when to press the "A" button to accelerate. The RPM you do doesn't affect the speed but if you want a harder exercise increase the resistance on your bike! 

How to Set-up!

Let's go over how to sweat bullets while dodging bullet bills. This should be too hard as this is just a script to upload to the Cronus Zen. Make sure to read the Ring Fit Round Up page if you aren't familiar with the software/hardware. Also remember one huge thing: SWAP the location of your Joy-cons for these Ring Fit Mods. The Ring-Con Joy-Con is now in your Leg Strap. The Leg Strap Joy-Con is now in your Left Hand.

• What you'll need!
  • The Cronus Zen: Amazon Link
  • Two Joy-Cons!
  • Zen Studio (Software to interact with the Cronus Zen): Webpage

Head over to my Cronus Zen GitHub Repository and download the MarioKart_Bike.gpc file! You'll need to upload the .gpc file to your Cronus Zen before using it on the Switch. Below is a quick rundown on how to set-up your Cronus Zen with the assumption you've read/watched the tutorial! If you need help DM me on or visit Cronus Zen's Manual for an in-depth tutorial!
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1. Connect your Cronus Zen to your PC via the Prog port (the port on the right side of the Cronus Zen). Open up the Zen Studio Software!
2. Connect the Cronus Zen to your Nintendo Switch of choice by connecting the port of the back side of Cronus Zen into a port on the Switch Dock!
3. Connect your Joy-Cons to the Cronus by pressing and holding the P2 button (Left blue button on the Cronus Zen). Once the Cronus starts flashing press and hold the Sync button on the Joy-Cons to pair them. They will rumble once connected
4. Head to the Compiler Menu on the Zen Studio and open up the .GPC file you wish to use.
5. Navigate to the top of the program to find the Compiler menu -> Build and Run.
6. The Device Monitor menu will appear and you're ready to go!

And yes, my mod is out there! just look up Mario kart ring fit! #mariokart #tiktokgaming #gamingsetup #fitnesstiktok #nintendo ♬ original sound - Louis 64

Future Plans?

Ehhh for now, No. This works just fine and maybe I could add something that detects the RPM but I'm lazy. This is just a template script and most likely can be easily edited to work for other games! With some quick edits I was able to make this work on Final Fantasy XIV and rode around Eorzea for a quick workout on some days. If you need help with this mod feel free to hit me up on !