Region changing a DSi on NAND

PADY · Apr 18, 2026

k66 said:
I don't quite understand what you want to do.
Don't you want to: uninstall Unlaunch, update system, access DSi shop?
You cannot achieve these 3 things through this tutorial(Region changing a DSi on NAND).
.
You need:
Uninstall Unlaunch: restore NAND backup first. Then you can use 'safe' Unlaunch to uninstall/install Unlaunch.
Update system, and access DSi shop: you can use the DSi Language Patcher. It can use system update and DSi shop while you change the language.

PADY · Apr 18, 2026

Hello,
Thank you for your reply.
To clarify my request, my goal is to follow the tutorial in order to change the region of my Nintendo DSi from its original Japanese version to a European version, by carefully following all the steps described.
Once all the steps are completed and the modified NAND is restored, I would like to obtain a fully functional console in French, without any error messages in the Internet settings, with normal access to the Nintendo Shop as well as system updates.
However, some points are still unclear to me. I would like to know if, once I have extracted the European donor NAND onto my computer from my French console, there are any files within the TWL folder of that NAND that need to be modified or deleted so that, after applying the tutorial modifications and restoring the NAND to the Japanese console, the Internet updates and access to the Nintendo Shop work the same way as on my original French console.
Finally, if possible, could you please explain the correct method to follow, with the proper step-by-step process, in order to obtain, at the end, a console set to the European region (which I have already managed to do), but fully functional, including online services such as Internet updates and access to the Nintendo Shop?
Thank you in advance for your help.

k66 · Apr 19, 2026

PADY said:
Hello,
Thank you for your reply.
To clarify my request, my goal is to follow the tutorial in order to change the region of my Nintendo DSi from its original Japanese version to a European version, by carefully following all the steps described.
Once all the steps are completed and the modified NAND is restored, I would like to obtain a fully functional console in French, without any error messages in the Internet settings, with normal access to the Nintendo Shop as well as system updates.
However, some points are still unclear to me. I would like to know if, once I have extracted the European donor NAND onto my computer from my French console, there are any files within the TWL folder of that NAND that need to be modified or deleted so that, after applying the tutorial modifications and restoring the NAND to the Japanese console, the Internet updates and access to the Nintendo Shop work the same way as on my original French console.
Finally, if possible, could you please explain the correct method to follow, with the proper step-by-step process, in order to obtain, at the end, a console set to the European region (which I have already managed to do), but fully functional, including online services such as Internet updates and access to the Nintendo Shop?
Thank you in advance for your help.

You cannot use this tutorial(Region changing a DSi on NAND) to "completely change the region", if you read the tutorial carefully.
.
As far as I know, there is currently no method to "completely change the region" of a retail DSi.
'Region changing a DSi on NAND' and 'DSi Language Patcher' both depend on Unlaunch.
'Region changing a DSi on NAND' can't update system and access DSi shop.

PADY · Apr 19, 2026

k66 said:
You cannot use this tutorial(Region changing a DSi on NAND) to "completely change the region", if you read the tutorial carefully.
.
As far as I know, there is currently no method to "completely change the region" of a retail DSi.
'Region changing a DSi on NAND' and 'DSi Language Patcher' both depend on Unlaunch.
'Region changing a DSi on NAND' can't update system and access DSi shop.

Hello,I have understood your message and I did carefully read the guide. When you mentioned the three possible issues, especially the fact that access to the DSi Shop would no longer work and that this was normal with the need to restore the NAND, I initially thought you meant this only applied at the end of the process. I believed that once the console was fully restored, access to the Shop and system updates would work again. I did not understand that it meant having to restore the original NAND every single time in order to access the Shop, which seems impractical to me. However, there is something I still do not understand. On some original Japanese consoles, I have successfully updated them to a European version. I first hacked them using Unlaunch, then installed the DSi Language Patcher, and performed the system update before launching Unlaunch. In those cases, the update works, for example from version 1.4J to 1.4.5E. The console remains Japanese, but with a fully functional European system version. However, when I follow the tutorial that involves modifying the NAND with TWL files, it does not work at all. This is why I am quite surprised, because it suggests that such a modification should be possible. Otherwise, how can an original Japanese console successfully update to version 1.4.5E in certain situations? Thank you in advance for your clarification. Kind regards.

k66 · Apr 19, 2026

PADY said:
Hello,I have understood your message and I did carefully read the guide. When you mentioned the three possible issues, especially the fact that access to the DSi Shop would no longer work and that this was normal with the need to restore the NAND, I initially thought you meant this only applied at the end of the process. I believed that once the console was fully restored, access to the Shop and system updates would work again. I did not understand that it meant having to restore the original NAND every single time in order to access the Shop, which seems impractical to me. However, there is something I still do not understand. On some original Japanese consoles, I have successfully updated them to a European version. I first hacked them using Unlaunch, then installed the DSi Language Patcher, and performed the system update before launching Unlaunch. In those cases, the update works, for example from version 1.4J to 1.4.5E. The console remains Japanese, but with a fully functional European system version. However, when I follow the tutorial that involves modifying the NAND with TWL files, it does not work at all. This is why I am quite surprised, because it suggests that such a modification should be possible. Otherwise, how can an original Japanese console successfully update to version 1.4.5E in certain situations? Thank you in advance for your clarification. Kind regards.

You have already gotten the answer...Unable to do what you ask.
There is currently no method to "completely change the region" of a retail DSi.
'Region changing a DSi on NAND' and 'DSi Language Patcher' use two different technologies to change the region and language.

For details, you can ask @rvtr.

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