For support in English, ask for help at Nintendo Homebrew on Discord.

If you appreciate this guide, I accept Donations.

Required Reading

Before proceeding, ensure you have read all of the information on ntrboot

This method requires temporary access to a Nintendo DS or Nintendo DS Lite that is compatible with your flashcart. This method uses the flashcart to run the ntrboot flasher .nds file on your NDS.

Note that in some rare circumstances, it may be possible for the flashing process to brick a counterfeit flashcart and render it permanently unusable. This is unlikely, but nevertheless only original listed flashcarts are supported. To reduce the chance of receiving a counterfeit card, it is recommended that you use a reputable site to buy your flashcart (such as NDS Card)

What You Need

Your ntrboot compatible flashcart

Two devices The source NDS / NDSL : the Nintendo DS or Nintendo DS Lite which is compatible with your flashcart The target 3DS : the 3DS family device on stock firmware

The latest release of boot9strap ( ntr boot9strap; not the devkit file)

boot9strap; not the file) The latest release of ds_ntrboot_flasher

Instructions

Section I - Prep Work

Power off the source NDS / NDSL Insert your flashcart’s SD card into your computer Create a folder named ntrboot on the root of your flashcart’s SD card Copy boot9strap_ntr.firm from the boot9strap ntr .zip to the /ntrboot/ folder on your flashcart’s SD card Copy ntrboot_flasher_nds.nds to your flashcart’s SD card Reinsert your flashcart’s SD card back into your flashcart Insert your ntrboot compatible DS / DSi flashcart into the source NDS / NDSL

Section II - Flashing ntrboot

Launch ntrboot_flasher_nds.nds on the source NDS / NDSL using your flashcart Press (A) to continue Use (Up) and (Down) to select your flashcart Press (A) to continue Select “Dump flash” to make a backup of your flashcart’s memory Input the key combo given to confirm Press (A) to continue Use (Up) and (Down) to select your flashcart Press (A) to continue Select “Inject FIRM” to install boot9strap to your flashcart Input the key combo given to confirm Press (A) to continue Power off the source NDS / NDSL Eject your flashcart from the source NDS / NDSL

Continue to Installing boot9strap (ntrboot)