I think he may be using RetroArch for Android and hoped for this place to be of help. However, this is a RetroPie site and not a general RetroArch site.

@GtBFilms said in Which emus are worth my time? Hit me with your thoughts..:

the 3D effect can be achieved with old-school 3D anaglyph cardboard glasses.

I have a traditional pair of sunglasses with red and blue lenses in the frames that are very comfortable. I've used them in many situations over the years, but currently they're sitting next to my Pi for the sole purpose of VirtualBoy emulation. While it's not a perfect solution for 3D support, I find that it works very well and it's quite a novelty to see these games visually approximated in the way they were intended.