I had discovered MelonDS, yet another Nintendo DS emulator.
Unlike DesMume, this one requires real BIOS & firmware files.
It's also just as slow as DesMume. You may or may not prefer it.
Put your bios files in /usr/local/home/.config/melonds.
(bios7.bin, bios9.bin and firmware.bin)
Start + Select to exit the emulator.
Button mapping is like the Nintendo DS.
Also saves might not work properly, not sure why but given the slow speed of it, that won't be an issue i guess...
As usual, it's a proof of concept and thus, it should not be used for gaming. (because its so slow)
Hopefully, this will convince melonDS devs to work on an OpenGLES hardware renderer. (unlike Desmume devs...)https://github.com/gameblabla/melonDS/raw/master/melonds.opk