Hello, your custom firmware saved me from having to order an older SD from the web (things are super hard to find nowadays).
So far, Metroid Zero Mission just crashes after the BIOS.
I'm trying to also play Pokemon Radical Red which does work...
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