KeyX Switch

KeyX
General
Author	TOM-BadEN
Type	Overlays
Version	1.1.6
License	Mixed
Last Updated	2025/11/06
Links
Download
Website
Source

Nintendo Switch button assistant with turbo and key remapping support. Features global or per-game configuration with auto-start memory. Consists of Tesla overlay and system module.

Features

• General:
  • Modern and beautiful Tesla overlay.
  • Dynamically modify turbo and mapping settings.
  • Optional modern UI notification popups.
• Key Mapping:
  • Remap 16 buttons (A/B/X/Y/L/R/ZL/ZR/D-pad/SELECT/START/L3/R3).
  • Works together with turbo without conflicts.
  • Perfectly avoids system warning popups about button changes.
  • Global and per-game configuration.
  • Auto-remembers on/off state.
• Turbo:
  • Turbo for 12 buttons (A/B/X/Y/L/R/ZL/ZR/D-pad).
  • Multiple buttons can turbo simultaneously.
  • Non-turbo buttons work normally during turbo.
  • Customizable press and release duration.
  • Global and per-game configuration.
  • Auto-remembers on/off state.
• Memory Usage:
  • System module: only 297 KB.
  • Notification popup: extra 688 KB.
  • Popup only uses memory when triggered.

Installation

Copy files to SD card root:

• /atmosphere/contents/4100000002025924/
• /atmosphere/contents/0100000000251020
• /switch/.overlays/ovl-KeyX.ovl

Supported languages:

• en.json (English)
• zh-cn.json (No need to add, already hardcoded)
• zh-tw.json (Traditional Chinese)
• ja.json (Japanese)
• ko.json (Korean)
• fr.json (French)
• de.json (German)
• it.json (Italian)
• es.json (Spanish)
• pt.json (Portuguese)
• ru.json (Russian)
• nl.json (Dutch)

Screenshots

Compatibility

• Key mapping works on all Switch models.
• As of v1.1.6, turbo works on all Switch models.
• Note: Turbo on JoyCon models may feel less smooth, but at least it works.
• LITE models still have perfect turbo performance.

Changelog

v1.1.6

• Added turbo activation delay detection to prevent accidental triggering of the turbo function.
• The turbo function now supports all models.
• Optimized the smoothness of the turbo function on LITE models.
• Note: Due to underlying system limitations, multi-button turbo on JC controllers performs only moderately. I’ve tried my best. It works perfectly on LITE models.
• Fixes
  • Fixed a BUG where a buffer overflow could cause a crash.
  • Fixed a BUG where, in some cases, Tesla plugin IPC calls could cause a freeze.

v1.1.5

• Fixed a bug where the mapping feature could not work properly on non-LITE models in some cases.
• Changed the plugin’s configuration file path from /config/AutoKeyLoop to /config/KeyX.
• If you have been using this plugin before, you can manually update the configuration path to avoid losing your settings.
• Note
  • Remapping function works on all models
  • Turbo function still only works on LITE models
  • The CN and EN versions differ only in the Tesla overlay title; everything else is identical.

v1.1.4

• Tesla Ovl
  • Fixed a bug, where IPC communication failed when switching configurations, if both mapping and Turbo functions were disabled.
• Note
  • Remapping function works on all models
  • Turbo function still only works on LITE models
  • The CN and EN versions differ only in the Tesla overlay title; everything else is identical.

v1.1.3

• Added Button Remapping Feature
  • Supports remapping between 16 buttons (A/B/X/Y/L/R/ZL/ZR/D-Pad/SELECT/START/L3/R3)
  • Can be enabled simultaneously with turbo function without conflicts
  • Perfectly bypasses system warning popups about button modifications
  • Global configuration and per-game configuration
  • Automatically remembers on/off state
• Optimizations
  • Turbo threads merged from 2 into 1
  • Significant code optimization throughout the entire project
  • System module now only uses 297 KB of RAM
  • Turbo and remapping functions pause when game is switched to background
• Tesla Overlay
  • Tesla overlay has been significantly redesigned to accommodate the new remapping feature
  • Added reset function to turbo button settings
• Note
  • Remapping function works on all models
  • Turbo function still only works on LITE models
  • The CN and EN versions differ only in the Tesla overlay title; everything else is identical

v1.0.3

• Added multi-language support (currently only EN)
• Users who require other languages can provide their own translations
• See the README for how to add them
• Please note that only Switch Lite is currently supported
• The CN and EN versions are completely identical, except for the plugin title

v1.0.2

• First Release

Credits

• libnx - Switch development library
• libultrahand - Tesla Overlay framework
• minIni-nx - INI config parser library

External links

• GitHub - https://github.com/TOM-BadEN/KeyX
• GBAtemp - https://gbatemp.net/threads/keyx-supports-turbo-and-button-remapping.676903/