NitroHax3DS is a tool to apply cheat codes to NTR (NDS) games on the 3DS. This tutorial guides you on how to install, add cheats, and how to deal with the 2,500kb (2.5mb) cheats.xml file size limit. This tutorial does not show you the general usage of NitroHax, as the homebrew GUI generally takes care of that for you.

Requirements

• A 3DS with Luma 6.1.2 or newer using boot9strap is the recommended setup for your 3DS and for any homebrew.
  If you are still on arm9loaderhax, pasta cfw, or anything alike, then try updating your hacks to boot9strap.
• NitroHax3DS 0.99.NTR (Final ver?) CIA file, Do not use the DSi release downloads.
• FBI 2.6.1 (Final) for installing NitroHax3DS CIA file.
• Revolution 4 Cheat Code Editor (R4CCE) for managing the cheats.xml cheats and therefore the file size.
• An Action Replay XML file (cheats.xml), e.g., DeadSkullzJr Repo (right click -> save link as), CodeJunkies EU, CodeJunkies US

NitroHax3DS Installation and Usage

Please follow the instructions on the NitroHax3DS readme for general Installation and Usage Instructions.

Lowering the cheats.xml file size

While NitroHax3DS has no actual cheats.xml file size limit, it should NOT exceed 2.5MB, nor should it really even get close to that size. NitroHax3DS loads the cheats.xml to RAM and the 3DS only has 4MB of RAM. This means you would potentially run out of ram, or leave too little amount of RAM available for the game or system to work sufficiently.

To be on the safe side I recommend lowering the cheats.xml file size to be less than 1.5MB in size. The lower it is, the better. You should only have cheat codes for games you want to use, and only have cheat codes you plan to actually use. White screens and crashes may be caused by the cheats.xml being too large (even if it's around 1.5MB).

1. Open R4CCE, click `File` -> `Open` -> And open the cheats.xml file.
2. Remove all cheats for games you do not have and/or want to use, the more you can remove the better.
3. Once you have the cheats.xml lowered as much as you can, Put it on the root of your 3DS SD Card.

F.A.Q

Q: I get a white screen when booting from Nitro but not when I boot normally;
A: The game may be unsupported, or the cheat code may be incompatible with your specific ROM region.

Q: I'm encountering a problem that happens even if I disable all cheats, yet doesn't happen if I play without NitroHax3DS;
A: It might be a NitroHax3DS problem. If you feel strongly that it could be a NitroHax3DS bug, report it on the GitHub Issues page and not here.

Q: Do DSi Enhanced Games work? What about DSi Exclusive Games?
A: No! [source] Sadly DSi Enhanced Games are not supported! This is due to NitroHax using an incredibly outdated Cart loader code that is not compatible with TWL game cartridges. This means both DSi Enhanced and DSi Exclusive games are not supported. E.g., Pokemon SoulSilver/HeartGold (DSi Enhanced), and Face Training (DSi Exclusive).

Got a question not here? Post it below.

 

[Altkatashi]

Could You guys add Pokemon Mystery Dungeon, Explorers of Sky. Thanks

 

[Merik2013]

Getting a white screen on boot for Yu-Gi-Oh 2011 Over the Nexus

 

[PRAGMA]

Getting a white screen on boot for Yu-Gi-Oh 2011 Over the Nexus

Try lowering the file size of your cheats.xml even further. I have updated the original post with more detailed information on why lowering the file size is recommended and why it might cause problems.

 

[PRAGMA]

What do I do for Japan region Games? You only listed Codes for US and EU in the Downloads.

You would need to google around for more Action Replay XML cheats.xml files, that would contain more cheats, specifically Japan region ones I suppose. Try the DeadSkullzJr repo which I added to the original post.

 

[Nexi_ya]

I can't find my cheats.xml file for some reason, i put it on the root but it doesn't show up in NitroHax

 

[Pk11]

I can't find my cheats.xml file for some reason, i put it on the root but it doesn't show up in NitroHax

Try using the usrcheat.dat fork (you can get it from Universal-Updater) instead, it's much simpler since it works with any size database. With that fork you'll just need a usrcheat.dat database, which can also be gotten from Universal-Updater. (The TWiLight Menu++ location where UU installs is checked by this NitroHax3DS)

 

[Nexi_ya]

Try using the usrcheat.dat fork (you can get it from Universal-Updater) instead, it's much simpler since it works with any size database. With that fork you'll just need a usrcheat.dat database, which can also be gotten from Universal-Updater. (The TWiLight Menu++ location where UU installs is checked by this NitroHax3DS)

i managed to fix it a few minutes ago, but i dont think cheats work with roms in TWilight menu

 

[Pk11]

i managed to fix it a few minutes ago, but i dont think cheats work with roms in TWilight menu

They do, you just need a usrcheat.dat then to press Y -> X on the game in TWiLight. Works for forwarders too as long as they're up to date, hold Y while loading then press X.

 

[Nexi_ya]

They do, you just need a usrcheat.dat then to press Y -> X on the game in TWiLight. Works for forwarders too as long as they're up to date, hold Y while loading then press X.

oh, thank you!

 

[Nexi_ya]

They do, you just need a usrcheat.dat then to press Y -> X on the game in TWiLight. Works for forwarders too as long as they're up to date, hold Y while loading then press X.

now i'm having a little issue. TWilight menu won't read the cheats for some reason...

 

[Pk11]

now i'm having a little issue. TWilight menu won't read the cheats for some reason...

Did you get a usrcheat.dat at sd:/_nds/TWiLightMenu/extras/usrcheat.dat? Installing from Universal-Updater should put it there automatically.