I don't know If it is possible, or if it already exists for that matter, but could you mirror A and B. So, A = Y and B = X. I think it would make playing games like Megaman Zero more convenient.
@Robz8 Games that I have tested that don't work in nds bootstap are: megaman zx and, yoshi's island.
Both crash at a black screen, megaman zx crashes after the opening credits, and yoshis island didn't even boot.
This Package utilizes MMMod by "send0r.de" for added functionality and customization.
You can find the features that MMMod adds to Nintendont here
This Package also includes the icon.png & updated meta.xml files for Nintendont.
Just extract the zip file, and put the "Nintendont" folder into...
I truly am sorry for my long response! :)
I accedentally gave you the wrong link this is the newest one: https://send0r.de/Nintendont/Mr. Mysterio's Mod/
You don't have to have two separate partitions for each, they will work on the one. If you do format it you will have to reinstall all of...
For modding games use "Wii Backup Fusion" and extract the wbfs file. Then you game dig through each file of the game.
-----------------------------------------------
I'm not entirely sure how to mod that specific game but you can practice modding wii games with Project M.