Sega Genesis - Nintendo Switch Online -nsp--us-... Link

As of the latest update, the US version of SEGA Genesis – Nintendo Switch Online includes (but is not limited to):

Note: The library expands over time. Unlike the base NSO NES/SNES libraries, Genesis titles include both English and Japanese (Mega Drive) versions in some cases. SEGA Genesis - Nintendo Switch Online -NSP--US-...

One of the most praised features of this specific emulator app is the CRT Filter. As of the latest update, the US version

While "Rewind" is for immediate fixes, Suspension Points allow you to save your progress anywhere in any game. Note: The library expands over time