ROM Hack [Tutorial] How to Decrypt, Extract & Rebuild 3DS|CIA|CXI Files

[Leftshark]

If I edit just the randomizer stuff on it, it works fine. But if I change around some of the sprites it goes past the 3ds screen then goes to a black screen till I turn it off. (Also does anyone know who I could contact with help for ohana3ds. Every time I export a pic it seems to change resolution)

 

[g.a.u]

try editted different rsf for KH3D
i edit rubish.rsf (not rsf.rsf) in your folder
game boot now ,but problem is it freeze at boot screen

 

[g.a.u]

Is slot0x25KeyX.bin in the tool pack already editted ?

 

[Asia81]

Yes

 

[D-Rex]

Could this be used to make a 7.2 encrypted game compatible with CFW 4.5?

 

[Asia81]

Could this be used to make a 7.2 encrypted game compatible with CFW 4.5?

No
7.X encrypted game doesn't work on CFW

 

[BullyWiiPlaza]

Proof that it works:

I'm pretty sure it's against the rules to link the (copyrighted) 3DS keys.

What's the point of saying that a few bytes are copyright by Nintendo?
Obviously that's not possible to copyright. Anyone can use these bytes in the same order like they did without it being an infringement. Stupid hypocrites these days.

Wouldn't it be more of a copyright issue to hack one of their sacred games, huh? I just did that.

This is a hacking scene. Why hacking in the first place if you respect a company's short sequence of bytes already.

Seriously, people need to man up and make decent programs and guides and quit the bullshit to save everyone's time. It took me almost 2 days (from nearly no knowledge about it) to do a full ROM hack because of the all the stupid and complicated steps. Without Asia81's great guide probably much longer.

 

[D-Rex]

No
7.X encrypted game doesn't work on CFW

Ok!
I thought that maybe one could decrypt the game and encrypt it back to a 4.5 compatible format.

 

[JVG]

I am trying to inject some models for May, and the instructions are: OW models go in a/0/2/1, Battle models go in a/1/3/3

However, when I navigate to those folders, all I see are files with no extensions. How can I inject my bins into them?

 

[Asia81]

You need to use GARC Tool for unpack, Ohana3DS for edit and GARC Tool again for repack

 

[JVG]

You need to use GARC Tool for unpack, Ohana3DS for edit and GARC Tool again for repack

Thanks! When I rebuild a folder, it gives it a .garc extension. Do I delete that or leave it?

edit: And do I change the .bin files to .154?

 

[Asia81]

http://www.pokemontrash.com/jeux-pokemon/images/garc-tool-3ds/creation-garc.jpg

 

[Purple_Shyguy]

I anticipate the pokémon nude mods

K thankx

 

[OmegaPikachu]

I get an Error when trying to use the "Decrypter le ExHeader" for AS.

It says "Error Opening Input File 2" for less than a second before it closes the CMD

Can someone also explain this to me

"In the tool pack you will find a slot0x25KeyX.bin file. Open it with a hex editor and replace 00 with the key. Copy and paste the key. The outcome will look like this "

What 00 is she talking about? Where do i find it?
What Key do i replace it with?

Sorry I'm such a noob, But I'd really like some help! thanks lol

 

[laramie]

I anticipate the pokémon nude mods

K thankx

Has ROM hacking gone too far...?

 

[GamingAori]

hey how i can decrypt and repack my rom with out updates? (xy) because when i use a update wild randomizer doesn't work :/

 

[laramie]

hey how i can decrypt and repack my rom with out updates? (xy) because when i use a update wild randomizer doesn't work :/

I'm not sure on how to undo the updates for games, I grabbed a fresh rip of OR and decrypted that and when I recompiled, It gets stuck on the black screen that says 3ds. PM me for the link to the tutorials I made.

 

[Asia81]

​

With this tutorial, you will can launch OmegaRuby or/and AlphaSapphir (but not XY) without his update .​

Tell me if something is wrong, or if you can't understand a part of this tutorial.​

​

Thanks a lot to BullyWiiPlaza for the english translation help ​

(Because i'm French, make a full tutorial in a good english is not easy for me...)​

​

This tutorial will try to help you decrypt a 3DS ROM to change its content and will also explain how to recompile a modified version.​

Although this tutorial is mainly based on Pokémon ROM Hacking, the decryption method is the same for all 3DS games developed with SDK 7.X or less.​

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Summary :​

- What you need​

- Prerequisites​

- With Internet (More faster)​

- Without Internet​

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

What you Need​

• A 2DS/3DS/3DSXL with SysNand Firmware between 4.1 and 9.2 for getting Xorpads. (No New3DS at the moment)
• A 3DS Linker compatible with this console version that will play the final game once modified.
  (Only Gateway 3DS is able to run edited game (Tell me if it's wrong))
• 3DS ROM (PokemonY.3ds, PokemonAlphaSapphir.3ds, etc...)
• An archive extractor like WinRAR that I recommend or 7-Zip which is completely free.
• An SD card (for the console) with a minimum capacity of 4 GB.
• Download this pack : LINK
• Download Python 2.7.7 (and not another): Click Here
• Download Notepad++ : ClickHere
• Download RxTool : Click here

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Prerequisites​

​

​

Obtaining slot0x25KeyX.bin :​

In the tool pack, you will find a slot0x25KeyX.bin file.
Open it with a HexEditor (HxD, PsPad, etc...) and replace 00 with the key.
Copy and paste the key (Search this on Govanify's Website).
The outcome will look like this :

​

​

Python Installation :​

Now, we will install Python 2.7.7. ​

To do this, download Python in What you Need, run the Python 2.7.7.msi file, choose the default installation directory, "C:\Python27" and allow the installation to complete.​

​

Once all these tasks are completed, you will have to add links in the "Path" environment variable. For this you need to go to "Start," right-click on "My Computer", choose "Properties" in the context menu, click on "Advanced System Settings" and finally "Environment Variables...".
Then in the lower column "System Variables" find the line "Path", double-click it.
A window appears. At the end of the line "Variable Value", append this:

;C:\Python27

​

​

Done, the prerequisites of the installation are complete.​

​

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~​

​

With Internet​

More Faster, because xorpads are useless.​

​

Part 1 : Decrypt your rom with rxtool​

​

First, you will need to download RxTools. Once it's done, do this :​

Put in the root of your SD Card :​

- rxTool.dat​

- slot0x25KeyX.bin (If your SysNand is 7.X or higher, your slot0x25KeyX.bin is useless)​

- YourRom.3ds (or named as you want)​

​

Launch the WebBrowser, erase cookies and data, and go to this URL :​

http://dukesrg.no-ip.org/3ds/go/?rxTool.dat

​

You can also use the QR code in roxas75's thread.​

​

Now, go in "Decryption Options" and launch "Decrypt CTR Titles".​

​

Once it's finished, remove your SD card and put it in your computer.
Now, your 3ds rom is decrypted. It means that your xorpads are become useless.

Part 2 : Extract Game partitions with 3DS Explorer

Go in English Folder (Or French, just the files names are different).
Open 3DS Explorer, and with it open your 3ds rom.

For the folder named (NCCH (CTR-X-XXXX) 0) (X represents the Game ID, and varies from game to game), which is framed on the screen above, do these 2 easy steps :

1) Right-Click ExHeader.bin > Save> Save it to the root of the folder "PackHack" named "DecryptedExHeader.bin" > A message appears, but just click OK.
A "DecryptedExHeader.bin" file is generated.

2) Right-Click ExeFS.bin > Save> Save it to the root of the folder "PackHack" named "DecryptedExeFs.bin" > A message appears, but just click OK.
A "DecryptedExeFs.bin" file is generated.

Now, Drag&Drop your Rom.3ds on getromfs.exe.
This may take 5 to 10 minutes, be patient.
A "EncryptedRomFS.bin" file is generated.
Rename it "DecryptedRomFS.bin"

Now, you can extract your game datas.

Part 3 : Extract Game datas

You should have those files :
- DecryptedExHeader.bin
- DecryptedExeFS.bin
- DecryptedRomFS.bin

1) Double-click on :
"Extract ExeFS.bat"
Your ExeFS content is extracted in a "exe" folder.

2) Once it's finished, use :
"Extract RomFS.bat"
Your RomFS content is extracted in a "romfs" folder.

Part 4 : Edit your game

If your wish to run ORAS (not working with XY) without his update, you need to do :
Go in "exe" folder. Rename code.bin to .code.bin.
Open pk3DS. Set language, and open your "PackHack" folder.

Accept to decompress your .code.bin file :

And click on YES if you want edit ORAS, or NO for XY :

Make your edits with pk3DS or another tool.

Or for another game, do what you want.


Part 5 : Rebuild your game

You need to rebuild your RomFS.
Open RomFS Builder, with it open your "romfs" folder (in "PackHack" )
Click GO. Wait and save it named romfs.bin :

Once your RomFS is rebuilded, go in "exe" folder.
Copy ALL files.
Paste all those files in "PackHack" folder.

Now, use the makerom for your Pokemon game, like MakeRom - AlphaSapphir.bat

Wait, and your game will be created named AlphaSapphirEdited.3ds (or other)

Optional :
If you try to rebuild a game other than Pokémon, because I've mentioned at the beginning that the tutorial is compatible for almost any 3DS games, instead of launching a "Makerom - Pokemon.bat", you simply run the file Makerom.bat which will be used for most other 3DS games.

In this case, you will need to open the file with a RSF.rsf advanced text editor like Notepad++ that I made ​​you download at the beginning.

The RSF is a sample provided, it's "pre-built", you will need to fill it with fitting information about the game you want to use it with.

Since helping you build a good RSF file is not the purpose of this tutorial, I will redirect you to a post written on GBA Temp that will teach you how to do so :
https://gbatemp.net/threads/tutorial-converting-3ds-to-cia-for-dummies.373722/page-35#post-5155838
You can also see the "Custom RSF Guide.jpg". Thanks to Queno138 for that.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~​

​

Without Internet​

 

[OmegaPikachu]

Hey when i try to use "XY & ROSA Extraire le RomFS" it says

"Error, IVFC segment corrupted
Error, RomFS corrupted"

what should i do?

 

[Asia81]

Have you extracted your EncryptedRomFS with getromfs.exe ?