NeoGeo Pocket was SNK's 16-bit handheld from 1998. Despite limited commercial success, it featured excellent fighting games and a distinctive clicky microswitched joystick.
Full-speed emulation on all R36 models.
The chip is the same in every model, so the rating is too. What differs is the screen: 4:3 panels suit most home consoles, the 1:1 square panel suits Game Boy and GBA and shows 4:3 games with bars.
The R36 handheld family runs NeoGeo Pocket titles with perfect compatibility out of the box.