Mainly looking for SNES, Genesis, NES, and Game Boy. I've seen lots, but wanted to know which has better compatibility.

SNEmulDS works reasonably well on normal flashcarts too, although it has some pretty big issues with layers at times.funny how this question is asked but there are just 1 or 2 emulators for each console and some of them are an upgrade version with a diferent name
gbc\gb gameyob (there is lameboy, which is diferent, but its outdated, gameyob is better)
the others, i didnt tried them much
i know the gba and snes ones only work under a DSTWO (there is a gba emulator for r4 cards but its bad..)
nesDS is pretty neat for NES games
SNEmulDS works reasonably well on normal flashcarts too, although it has some pretty big issues with layers at times.
