Hello! I have a empty Flashcard and I tried a lot of firmwares but non of them worked. The Flashcart is this one: I have a regular DS Lite, is quite old. If someone can help me it would be really good.
Try talking to @Soundbox3 (topic: https://forum.romulation.net/threads/identify-my-flashcart.64495/).
Maybe you should try the 2014R4isdhc-sliverEnglish3.01. Make sure to put the firmware files and several nds roms on root of the microsd card.