I used the NDS to Wii U injector, which created a folder with the game files, placed it in a "games" folder on the root of the SD card, then I added "[VC(Game Title ID)] at the end of the game's name on the SD card (as this one YT video suggested).
Switched over to Tiramisu and tried it, but Loadliine's just showing me an empty screen.
The various settings and the option to switch between screens are both here, but that's about it.
Got SMT Strange Journey to work with the help of UWUVCI by using a game of the same region as a base. Things seemed fine until I realised the bottom screen (the one I have on the gamepad) is pitch-black. I can't really play the game.
Any reason this happens or is it simply a side-effect of the...