Okay, frankly there are only two real options now if you want to use emulators: DeSmuME and No$gba with No$Zoomer. DeSmuME is for people with reasonably fast CPUs. No$gba is for people with slower and older computers. With No$Zoomer it can play most games reasonably well, but nowhere near as well as desmume of course.
Other than that? Well you could try iDeaS, it's still being developed at all. Maybe you'll even like it. But if you noticed nobody recommends iDeaS, because it's usually not nearly as good as those two.
As for the rest, don't bother with them. They are mostly not worth even trying. For example NeonDS stopped being updated years ago, and even then it was never anywhere as good as No$gba.
These are all your alternatives when it comes to emulators. If you've tried them all and have not found them to your liking then I'm afraid there is nothing else left to try.
