Yaba Sanshiro works for me. I use the bandits no clutter collection on my Nvidia shield.
For me everything works so far (retroarch, dolphin, Yaba Sanshiro) besides of Mupen64 (hyperspin gives me the error mentioned a few posts earlier) and when I try to open a PSP game, all it does is open PPSSPP.
Great job so far @reznnate, looking forward to show my daughter, which will be born in October, my childhood (when she is capable of holding a controller of course :D)