I tested on two different m3 ds real (one is from around 2008, i don't know for the other but probably more recent) and they have the same behaviour.
They both autoboot (even without an sd card), there is no dual boot so it auto boots to TWLMenu++ v26.2.0.
But they do boot original gba...
Hi, I just found back my old GBA Expansion pack (From M3 ds real) but it doesn't seem to work with TwilightMenu. If I keep it in slot 2 all text turns to giberish and no backup will actually load.
After testing with YSMenu and the original M3 firmware, the expansion pack does work without any...
I may try the new ram site, and download more RAM to my Switch. Not sure if ddr3 is the right ram
for it tho. Edit- no it uses floppy Ram, just like @AncientBoi