There are SNES and MegaDrive emulators for 680x0 machines, but even on 68060 they run like slideshows and the SNES emulator developed especially for Amiga (thus faster but without sound) is very uncompatible, but here are some links if you are really interested:
Amigenerator seems the best (only) option for the Sega Megadrive. For SNES you can try some of
these with dubious results.