I see your reply but i have like a bug so ill try sending it here like a new coment. Idk why happen but it doesnt let me reply coments xd so horrible like "verify ur gmail" or "acount" but i did that alredy...anyway jajsjajs here is what i wanted to writte.
Hi :D sorry for the hour, i got the notificación juat now thanks to my Gmail. Ill writte the "how -to" manual so those with a dsi or even Ds can played perfectly(in clasic DS those with 4mb of ram well kinda maybe some lag being honest but idk i dont have one ds fat or ds lite) My common language is spanish i know english though but my problem is when i write or speak, kinda Messed up. So by this point ill try using the translate so there wont be mistakes explaining.
"How to run the game"
I use twilight menú on a Sd card not flashcard because i dont have one but it should be the same so dont worry. (Except R4imenu, flashcard that use this kernel may have problem says the page, so u guys should read tht first if its your case)
Standard TWiLight Menu relies on GBARunner2 to run GBA games. GBARunner2 isn't a traditional emulator; it's a hypervisor that translates code. Modern homebrew games are built using updated community tools (like the Butano engine) which modify RAM layouts in ways that GBARunner2 simply cannot handle, leading to the white screen crash.To fix this, we need to manually trigger the newer GBARunner3 engine using a standalone frontend.
"PrerequisitesBefore starting": make sure you have the official GBA BIOS file. Find a GBA BIOS file online (it must be exactly 16 KB once you extract the zip/rar where usually they are when install). Rename it to bios.bin (all lowercase).Place it inside a folder named _gba on your SD card root.
"GBARunner3": Go to the official repository/guide and download the GBARunner3-hicode.zip(the download appear as GBARunner3.zip file on the page) file and the gbar3-frontend.nds file. (https://sanrax.github.io/flashcart-guides/tutorials/emulators/)
"Extract the Engine": Open the GBARunner3-hicode.zip. Inside, you will see a file named GBARunner3.nds. Drag and drop this file directly into the root of your SD card (SD:/GBARunner3.nds).
"Merge System Files": Inside that same zip, there is a _gba folder. Open it, copy all its contents, and merge/paste them inside your own SD:/_gba (where your bios.bin is). Do not delete your BIOS!
"Setup the Frontend": On your SD card, create a folder named Emulators (e.g., SD:/Emulators/). Copy the gbar3-frontend.nds file into this folder. (This part is mostly for the organization)
"How to Play & What to Expect": Boot up your DSi and open TWiLight Menu++.Navigate to your Emulators folder and launch gbar3-frontend.nds.A brand new visual menu will load. Browse to your GBA folder, select your homebrew game, and press A.Note: The screen might stay white for a few seconds right after the GBA logo. This is completely normal! The DSi is just precoding the heavy homebrew data into its RAM. Give it a moment and it will boot. Also since the DSi hardware is being pushed (probably) to its absolute limits to map this modern code, you will experience some audio lag or sound stuttering/choppiness.Don't worry, this is not an audio delay or a game-breaking bug, it's just minor stuttering because of the DSi CPU processing limits. Since these games are mostly text-based Visual Novels, the slight audio choppiness doesn't ruin the experience at all. The games run perfectly fine, scenes load great, and the text is fully readable and playable :D!
Thx! I hope this help! For more help you all can ask any time (as long as im online jajsjsjsxD)