[Guide] Modding on Yuzu Emulator (UMM Method) [Super Smash Bros. Ultimate] [Tutorials] (2024)

Also, I will not entertain your questions, don't ever DM me this! If you want to ask questions, please go ask them on Yuzu Discord Server.

Look. I know the emulator is still on its early infancy and not everyone is able to play it at full speed, but just in-case that day comes, I will present this guide since this is one way to do so unless...
Skyline for the emulator like how Citra 3DS got SaltySD!

DISCLAIMER:
If your Nintendo Switch is not modded, please read this guide first to install CFW on your Switch. DO IT PROPERLY!
Come back here once you're done modding your Switch.

Also, be careful with outdated video tutorials.

tl;dr: Modding on an emulator is poor yet. Go mod your Switch. You won't get banned unless you pirate games and you won't brick your system unless you drop it 5ft above.

• Modded Switch
• Ultimate Mod Manager
• Any mod
• Super Smash Bros. Ultimate and Update (Latest version)
  
• Yuzu Switch Emulator

Procedure:

1. Right click your game and go to Dump RomFSand press Dump RomFS from SDMC
2. Select Base
3. Select Full
4. Dumping takes at least 25-30 minutes. After you're done dumping, the emulator will open the dump folder.

5.1. Startup (Yuzu)

1. Go to File and click Open yuzu Folder
2. Go to sdmc and create a folder UltimateModManager. Then, open UltimateModManager folder and create another folder mods
3. Go to UltimateModManager\mods and place your decompressed mod folder
   UltimateModManager\mods\[Mod Folder]\
   Example: sdmc\UltimateModManager\mods\sanic_april_fools_update\fighter and ui
4. Open Yuzu
5. Boot Ultimate Mod Manager, and install mod

5.2. Startup (Ryujinx)

1. Make sure you download Ryujinx as Yuzu have problems with Homebrew
2. Please movedata.arcfromyuzu\sdmc\atmosphere\contents\01006A800016E000\romfstoRyujinx\sdcard\atmosphere\titles\01006A800016E000\romfs(please create these folders if you haven't)
3. On Ryujinx Emulator, go to File and clickOpen Ryujinx Folder
4. Go tosdcardand create a folderUltimateModManager. Then, open UltimateModManager folder and create another foldermods
5. Go toUltimateModManager\modsand place your decompressed mod folder
   UltimateModManager\mods\[Mod Folder]\
   Example: sdcard\UltimateModManager\mods\D_oh_\fighter and ui
6. Go back to Ryujinx
7. Boot Ultimate Mod Manager, and install mod
8. After installing, move data.arc back to yuzu\sdmc\atmosphere\contents\01006A800016E000\romfs

5.3. Loading

1. Go to Emulation and press Stop
2. Boot the game.
3. If it crashes or freeze, please close the emulator, reopen it, and boot the game again.

Here are list of things that you CAN'T DO when following this tutorial:

1. You can't load mods that were created after July 2020. Always check the date of the mods before installing.
2. You can't load SaltyNX plugins.
3. You can't load Training Modpack.
4. You can't load Minecraft Skin Plugins.
5. You can't load Turbo Mode.
6. You can't load anything ARCropolis.
7. You can't load ARCadia.
8. You can install custom intro, custom final smash, custom music, additional music packs.
9. You can't use Quazar as it did not notify if files are too big to compress.
10. You can't load "all" Pyra/Mythra mods due to fixed textures when created.

6.1. What is a Compression Error?

6.2. Why no modder fix it or make it compatible to Ultimate Mod Manager?

6.3. Why Gamebanana do not have an Ultimate Mod Manager section or have a list of mods?

For list, it's up to the mod creator or you guys to list THEIR mods and see if it's compatible to UMM or not.

Q: Can I run mods on RyujiNX Switch Emulator?
A: Yes but method might be different and will be on a separate tutorial to not make any confusion.

Q: So I don't have a Switch and I downloaded it online/got it from a friend, can I still get data.arc?
A: I don't support anyone who admittedly pirate games by downloading them on the internet.But if you got it from a friend who OWNS a modded Switch, then yes. You can dump.arc. Just follow the guide. Any issue on dumping and loading the game without mods might be caused by your ROM being corrupted while dumping.

Q: Will SaltyNX be compatible with this emulator?
A: Sadly no since SaltyNX requires it to run in the background while playing Smash.

Q: Will Skyline be able to run on the emulator?
A: Unfortunately, it will not, just like SaltyNX because it also requires it to run in the background while playing Smash. The sad truth is that Yuzu Team's high priority is not modding games but optimizing the emulator so that it can play games.However, the Skyline/ARCropolis team are working with the Yuzu Team to implement that on Yuzu. So far, ONLY Skyline works but loading any .nro plugins will not work.For now, it's impossible to have moveset modding montage on 4K Resolution on Yuzu. If you want to do it on emulator, follow the Ryujinx guide.

Q: What about Arcropolis? Will it work?
A: Arcropolis is a plugin for Skyline. If Skyline NRO loader don't work on Yuzu, then Arcropolis don't work on Yuzu.

Q: The emulator freezes when I press X in Ultimate Mod Manager after installing.
A: The emulator doesn't have support to open another app from an app. Please follow the guide and don't launch the game via UMM.

Q: Can I use the emulator to test my mods?
A: Yes you can! Some of my screenshots in my mods were taken from the emulator. But however, no moveset modding or mods that requires SaltyNX/Skyline.

Q: Will there be a Switch Emulator for mobile devices?
A: NO! Phones aren't really powerful to play Citra 3DS Emulator and now you're asking for an Android port of the Switch? I prefer buying the console while it's hot than throwing your money for a really expensive gaming phone. There's the Skyline Switch Emulator but that still not able to render 3D games properly, including Smash Bros.

Q: When I install a mod, I got "bytes too large compression failed on ".
A: That's because the mod that you probably installed is for ARCropolis. I'm sorry but current mods don't support Ultimate Mod Manager.

Q: Can I use ARCadia to load mods?
A: No. Since there's no Skyline/ARCropolis support, ARCadia will not work. However, it will open normally but will not function properly.

Q: Can I use Smash Minecraft Skins to load a custom skin for Steve/Alex/Zombie/Enderman?
A: No because this is a Skyline plugin.

Q: When are we going to have Skyline/ARCropolis support on Yuzu?
A: They're still working on it. Be patient.

Q:I got " does not exist please check directory" error.
A:Make sure that you update your game so that it match and make sure that the mod path is correct.

Q: I am using Vulcan and I can't open Ultimate Mod Manager.
A: You can't open UMM on Vulcan. Switch to OpenGL in order to open the application. You can still use Quasar Mod Manager but it does not detect any compression issue. If you see textures or models gone corrupted, then the mod you installed is for ARCropolis. No fix, just uninstall the mod.

Q:When I dump romfs, it did not get the correct data.arc size (17GB) but I install them on NAND.
A:No clue. Best to try dumping it on a clean yuzu folder (backup and delete or rename your NAND folder) and install the update again. If problem persist, go to the Yuzu Disscord Server.
https://discord.com/invite/u77vRWY

Q: Booting Ultimate Mod Manager takes too long to boot (Stuck in Launching screen) || I got this issue when opening UMM.

A: I've recently got a talk with Yuzu Team and they said that Yuzu Emulator is unstable with Homebrew Apps. To fix this, try disable MacroJIT.
If that doesn't help, close the emulator>open it again>open Ultimate Mod Manager.
If that still doesn't help, backup your current yuzu folder (in Roaming) by renaming it other than yuzu, open Yuzu, add NAND and keys (you can move/copy them from your backup), and launch Ultimate Mod Manager.

Any questions regarding installing mods or setting up Yuzu, please take screenshots and upload them on Imgur. Thank you.

So yeah. That's all. Maybe come back once Yuzu is fully playable to everyone.
Maybe in a year or so on certain computer specs