ndsi-savedumper VS GBARunner2

First, follow dsi.cfw.guide to get homebrew setup on your DSi (you must install Unlaunch or it won't work). Then download DSi save manager and use that to dump your save file. Then you can move it to your PC via the SD Card

For DS (Requires flash cart)For DSi (requires Modding)For 3DS (Requires Modding)

Restore that edited save file to your game using savedumper.

Just to add to this, there's also ndsi-savedumper. It's no longer in active development, but you can get it here: https://github.com/edo9300/ndsi-savedumper

You can use a savedumper (https://github.com/edo9300/ndsi-savedumper) for dumping and injecting saves from and to legit cartridges. If you're playing a gba game on the DSi, you will have to install GBARunner2 (https://github.com/Gericom/GBARunner2) in order to run gba .rom files. I'd try placing your .sav file next to your .rom file and naming them like this: "{filename}.rom" and "{filename}.sav", where the {filename} part is identical.

ndsi-savedumper

GBARunner2 is a plugin that lets you run Gameboy Advance games inside TM++. Follow along with the instructions on the GitHub link to install. This should also let you play Gamboy and Gameboy Color games as well.

These days, when I play gba games on the DS Lite(have an rg35xx now) I use GBARunner2 to play gba games on slot 1. I know it's not what you're wanting, but it's still worth checking out if you've never used it.

You can use gbarunner2 to play gba games

For gbarunner2, setting it up is as simple as going to the github page then downloading 'GBARunner2_arm9dldi_ds.nds' and puting it on your sd card. If it doesn't work then you should use 'GBARunner2_arm7dldi_ds.nds' instead. It will allow you to launch gba roms, though compatibility isn't great. It would honestly be better to mod your 3ds to play gba roms using open_agb_firm

You need to patch this RTC patch onto the Pokemon Red Chapter Rom, then you can use Boktai to change it to your liking.

Playing GBA games isn't a great experience on most flashcards. However, you can use gbarunner2 for GBA games: https://github.com/Gericom/GBARunner2/releases/tag/v20200812-131430_6e4ce45

Download gbarunner2 for GBA games: https://github.com/Gericom/GBARunner2/releases/tag/v20200812-131430_6e4ce45 Use GBARunner_arm9dldi_ds.nds first, if it doesn't work, use GBARunner_arm7dldi_ds.ndsibstead

You will also need to test some homebrew to see if it launches too, any homebrew will work, though I'll give you some examples to try out: - DS Reader - Text reader - Gameyob - GB/C Emulator - Gbarunner2 - GBA Hypervisor - Try GBARunner2_arm9dldi_ds.nds first and if it doesn't work, use GBARunner2_arm7dldi_ds.nds