It works for old R4 card with YSmenu to play Pokemon B/W

BUT it doesnot work when playing Eigokoro.nds and New Fire Emblem.nds

it reports rom load error -5

So if you use Ysmenu for R4, you have to put TWO r4patch.dat in your R4 card, one is this for b/w use, other one is the original r4patch.dat, you can use the R4wood file manage function to paste the one you want to use to the Ysmenu folder

 

use the clean rom