I'm not quite sure if this is the right place to ask but i have this problem while trying to play mario kart wii.
All Wii games works fine but when i load mario kart it says: "Could not write to/read from wii system memory. For details, please...
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