Digimon Universe: Appli Monsters (3DS)
English Fan Translation v1.2

Appmon Chip... ready! The wait is over!

We're proud to present the final result of the endeavor to bring Digimon Universe: Appli Monsters (the 3DS game) to English-speaking audiences. The project began in late May 2025 and was finished in just under a year, in May 2026. The game is fully translated and can be played in English from start to finish on a modded 3DS console or an emulator. Huge thanks to everyone who helped bring this to completion, as well as to everyone who followed it from beginning to end!

Download Patch v1.2 from GitHub Join the Discord Server

A copy of this page is included in the download.
See sections below for patching instructions and additional info.
Be sure to read the "Before Patching," "Patching" and "Updating" sections.

Screenshots

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This is the most hassle-free patching method. Provide the correct ROM (see the "Before Patching" section), select the patch variant you need, wait until your ROM is verified and press Apply patch. Your patched ROM will be saved as a regular file download through your browser. Enjoy! If it doesn't work, the most likely reasons are: browser too old (update), or your device doesn't have enough RAM (you'll have to use a different patching method).

• 2026.05.15 — Version 1.0
  • The initial release. Yay!
• 2026.05.20 — Version 1.1
  • Corrected Mediamon's Signature Skill name: Virtual Birth → Virtualverse.
  • Corrected an erroneous type reference in Raidramon's App Link description: Game → System.
  • Fixed various typos and mistranslations in dialogue.
  • Rephrased a number of dialogue lines to sound more natural.
  • Improved the README file.
  • Improved the patcher scripts.
• 2026.06.07 — Version 1.2
  • Fixed Weatherdramon's name being wrapped onto a new line in the Appmon Index due to being too long.
  • Corrected several typos.
  • Improved the README file.

First of all, you need to obtain a copy of the Digimon Universe: Appli Monsters ROM (the full version, not the free demo subtitled Cyber Arena). The authors of the fan translation will not provide it, so this step is entirely up to you. Do not share, request or discuss illegal downloads in any spaces related to the fan translation, or, better yet, anywhere at all.

The ROM needs to be an untrimmed decrypted .3ds dump of the physical cartridge. You can dump and decrypt your own copy using GodMode9 on a modded Nintendo 3DS. Please use the internet for help if necessary, it has plenty of relevant information.

Properties of the expected ROM:

• File size: 1.0 GiB
• SHA-1 hash: 5743d3f357d05d97124773618d5b6dde3c5e85b2

Other ROM variants are not supported. Issues caused by using them won't be addressed. Keep in mind that the patcher scripts included with the download may accept some incorrect ROMs and then produce a broken result, so make sure you provide a correct copy.

You can use the form below to check if your ROM file is suitable for patching.

You can mark the steps you've completed with checkboxes to keep track of your progress.
This is purely for your convenience. Reset all checkboxes

• Step 1: Create an empty folder anywhere on your computer. We'll refer to it as "work folder".
• Step 2: Extract the contents of the downloaded appmon_en_patch_v1.2.zip archive into the work folder.
• Step 3: Also place your decrypted original ROM in the work folder and rename it (the ROM) to appmon.3ds.
• Step 4 (choose one that's relevant for you):
  • If you're using Windows, double-click appmon_patcher_windows.bat in the work folder.
  • If you're using Linux, open your terminal in the work folder (or cd to it) and run:
    chmod +x ./appmon_patcher_linux.sh; ./appmon_patcher_linux.sh.
  • If you're using macOS, open your terminal in the work folder (or cd to it) and run:
    chmod +x ./appmon_patcher_macos.sh; ./appmon_patcher_macos.sh.
• Step 5: Read the text in the console window carefully and press Enter when ready to start.

When the patching process finishes, you'll have two patched ROM variants in the work folder.
Expect both of them to be about half the size of the original ROM due to trimming.

• appmon_en_v1.2_console.cia is for installing and playing on a modded 3DS.
• appmon_en_v1.2_emulator.cci is for playing on an emulator.

Grab the one you need and install it on your modded 3DS, or launch it using an emulator. Enjoy the game in English!

Best option: just use the browser-based patcher embedded in the online version of this page.
(It's impossible to include in the offline version of the page due to technical limitations.)

The rest of this section is a very generic how-to, kept just in case the online page goes down.

If you've been playing an earlier version of the fan translation and want to update it, you must re-patch your original clean ROM, not the ROM that was already patched. Patch it "from scratch," and then install the newly patched version on your modded 3DS or launch it using an emulator.

Very important! If you're a modded console player, your first step before even thinking about updating should be to back up your save data, because the console will erase it if you uninstall the game or even simply overwrite it with a newer version. You can back up your save data by going to System Settings → Data Management → Nintendo 3DS → Save Data Backup → Backup → Digimon U Appli Monsters.

After installing the updated version, you'll have to follow similar steps to restore your backup: System Settings → Data Management → Nintendo 3DS → Save Data Backup → Restore → Digimon U Appli Monsters.

Emulator players generally don't have to worry about this (unless you're fully emulating the 3DS environment and installing everything through the 3DS home menu and FBI, like you would do on a real modded console, which nobody does). But backing up your save once in a while is a good idea in any case.

General questions:

• Q: Can I install the DLC? Will it break anything?
  A: You can. It won't break anything.
• Q: Was there an update for the game and is it compatible with the patch?
  A: There wasn't an update.

Emulator questions:

• Q: Can I play this on an emulator?
  A: Yes. The recommended one to use is Azahar.
• Q: What about emulating on a mobile device?
  A: You can do that as well.
• Q: My emulator's bottom screen is blank or flickering, what do I do?
  A: Look for a setting called Disable Right Eye Rendering and uncheck it.
• Q: Some graphics are missing, what do I do?
  A: Try switching between OpenGL and Vulkan rendering.
• Q: Can I scan QR codes on an emulator?
  A: Yes. Find camera settings and set an image for the rear camera to see. Then go to the QR Code menu in the game.
• Q: Can I use emulator savestates?
  A: You shouldn't. Save states on 3DS emulators don't work well, they can softlock and crash you game.

For the most part, everything in the patched game works perfectly fine. However, there are some minor unresolved issues that don't disrupt gameplay. Here's a list of them.

• If your save file was first created in the Japanese version of the game, expect all the Japanese characters in the player, Appmon and deck names to appear distorted when you load it in the fan translation, because the Japanese font is not well supported. You can simply rename your Appmon and decks to fix this, but changing the player name will require hex editing of the save file (DGMGame0.bin). The player name is located at offset 0x3c, you can modify it freely.
• In local multiplayer battles, player names longer than 6 characters may be visually truncated to 6 characters. For example, the name Benjamin will be displayed as Benjam. This only occurs in the room creation/selection interface and during the following local multiplayer battles. The issue is purely visual and temporary, and it doesn't affect anything. Attempts to patch this limitation caused battles to desynchronize after the first turn, so the decision was made to leave it alone, at least for now.
• The font of the "live chat messages" floating across the screen in Cyber Arena battles (overlayed on top of the action to simulate Niconico-style "danmaku comments") is slightly stretched horizontally compared to the rest of the text in the game. This will probably go competely unnoticed by most players, but the visual inconsistency is there. Changing it is non-trivial, so for now it has been left as is.
• Near the beginning of the game, when you're taught how to convert Appmon fragments for the first time, the tutorial highlight prompting you to select Tellermon fragments is slightly misaligned in size due to the menu being widened compared to the Japanese version. The highlight size isn't defined in a straightforward way, and fixing this minor issue would've required a significant amount of tinkering for something that's only visible for a few seconds and never seen again. Most players probably won't even notice that anything is off.
• (A theoretical issue.) Since support for all of this game's internet battle features ended long ago, there's currently no way to access any of the interfaces related to them. As a result, the translation of these parts had to be done "blindly," by translating text and textures without being able to see how everything actually comes together in-game. This means that if a service such as Pretendo ever adds support for this game in the future (unlikely, but not completely out of the question), and those features become accessible again, some of their visual elements may appear broken. But until that happens, if it ever does, there's no way to tell.

• Main Translation: Geo
• Graphics Editing: Geo
• Programming: Geo, Romsstar
• Text Editing: Geo, birdboy2000
• Additional Translation: Fat Cat
• Title Logo Adaptation: LouLilie
• Testing: Geo, birdboy2000, Ren D., Lys T.

As an added bonus, the patch archive also contains a large collection of QR codes for the game, compiled from many different sources and optimized for use on emulators, while also being fully suitable for scanning with a real 3DS console's camera. The codes allow you to obtain any Appmon at any time, as well as receive some bonus items. Be careful, though, as it's very easy to trivialize the game for yourself this way.

You can find these QR codes in the appmon_qr folder.

Special thanks to ChefKyroo from the project's Discord server for scanning their entire Appmon Chip collection and sharing the scans with everyone.

Credits for other sources: Long's Toys, Digimon Malmutt, KRX50, rustmarrow, Diary Channel, 神クレア/シレン, Vtoy Studio, Coca TOY TV | おもちゃレビュー, Lost in Translationmon, DarkDjango, zenihappy_gyou, Axel97, Wikimon.

Please feel free to join the project's Discord server to meet other Appmon fans and discuss the game and the fan translation, or anything else related to Appmon or Digimon in general.

Server invite link: discord.gg/G7mhtHYhyF