Will Nintendo DS, CEMU(WIIU), and Citra(3DS) be implemented anytime soon?
nds : probably.
cemu : no (require windows 7)
for the nds, i'm not really motivated while i've not convince that it is usable without a touch screen or similar.
do you have example of game interesting with a normal gamepad ?
None in particular. I play Pokemon, Zelda, etc.
it's playable with a basic pad ? no need a special device ?
nadenislamarre I was using the Drastic emulator on retropie and its worked great. One stick is used to move a cursor and you click a button to simulate a touch. It wouldn't work for games like Fruit Ninja, but most games, it works fine.