I apologize if this has already been addressed. I searched but couldn't find a solution.
Using Waninkoko's Firmware Updaters 4.0 I seem to have bricked my Japanese Wii, with a legacy Wiikey. Everything was going fine at first. However, after the Photo Channel I got an error and a black screen...
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