ROM Hack Help for a 3DS Buider Mod

[Asia81]

Hi,
I try to do a mod of 3DS Builder.
But I stuck for add Pokémon Games.
I added my Title ID (0004000000486900) in the ressource txt (3dsgames.txt):

000400000011C500   ECLA   Pokémon™ Alpha Sapphire
0004000000486900   ECLA   Pokémon GBAlpha Sapphire
0004000E0011C500   ECLA   Pokémon™ Alpha Sapphire Update Ver. 1.4

And edited the exheader.cs:

But I have a blacscreen after the boot logo.
BTW, it worked for my BDU and another game.

I guess it's about the PlainRegion file, 3DS Builder can't add it properly when he detect my hack.
@SciresM or someone else, could I have help?

 

[Asia81]

help, please?

 

[mcaboosec]

I'm having the same problem. I've modified it to be able to force it to apply the plain region. Let me know if it changes the black screen problem.

EDIT: Removed the file as it doesn't help to change titleid and could cause more problems with 3ds files. I've posted a way to do it with CIAs below.

 

[Asia81]

I'm having the same problem. I've modified it to be able to force it to apply the plain region. Let me know if it changes the black screen problem.

I will try tomorrow, but could you explain me what you did ?
And btw, could you also give me the source for my futurs hack?

 

[mcaboosec]

I added 2 checkboxes: one for ORAS and one for XY. Normally when it goes to build the .3ds file it checks the titleid in the exheader. If it matches a pokemon game, it inserts the plain region. The checkboxes just force it to insert it whether the titleid matches or not. I can send the source changes if you want.

 

[Asia81]

yeah, thanks!

 

[mcaboosec]

Here you go! Changes are in Form1.cs (B_Go_Click) and CTR_ROM.cs (buildROM and setNCCH). Nothing major, just boolean checks.

EDIT: Same as above.

 

[Asia81]

nice, thanks again man!
I'm downgrading an o3ds, so I will try it asap

 

[mcaboosec]

Have you been able to successfully change a title id and convert it to a .cia using other tools? Every time I've installed it with a different id (Neo X or Star Sapphire) I get a black screen.

 

[Asia81]

For know, I only tried with Bravely Default EUR/USA.
0FC5 -> 0BD5
0FC6 -> 0BD6

I didn't try the .cia, but the .3ds work fine.

 

[Asia81]

Always a black screen :/

 

[mcaboosec]

No luck here either. I have no idea how many times I've installed Neo X as a cia now. One guess I had is that there are some other checks/hashes that fail when the title id is changed.

EDIT: Never mind! I just got Neo X and Pokemon X to install side-by-side as a cia. Here's what I did:

1. Downloaded the 3DS to CIA converter in this thread
2. Dump Pokemon X using Uncart
3. Move the resulting 3ds to sd:/D9Game
4. Decrypt the .3ds with Decrypt9WIP (Game Decryptor Options -> NCCH/NCSD Decryptor)
5. Copy the decrypted .3ds to the same folder as the converter and add "_modified" to the end of the filename
6. Drag the .3ds onto the make2.07.bat file
7. When the menu comes up, choose "Use auto RSF", "Use Original EXHEADER (CIA)", "Extract ROMFS for changes", and "Check auto RSF before start"
8. Enter "s" to start the process
9. The generated RSF will open. Change the title id and save id in the RSF. I changed the product code as well to make it easier to find in FBI.
10. Save and exit
11. Enter Y in the converter window ("Is your .rsf ready (y)es (n)o?")
12a. It will now extract the RomFS. If you have a modified .code, banner, or icon, put it in the <3ds to cia converter folder>/<.3ds file name>_modified/decrypted folder.
12b. Insert your files into the RomFS folder in the same folder as above and rebuild it with the RomFS Builder the converter opened.
13. "Is your romfs ready (y)es (n)o?" (yes, it is )
14. It'll make the cia for you in <.3ds file name>_modified/cia. Install it with whatever cia installer.

I tried this process where I also edited the title id in the exheader, but it did the same thing (black screen).
Not sure if you needed a .cia or .3ds, but I figured someone else might want this info too.