Neo Geo Pocket
The Neo Geo Pocket was SNK's first foray into the handheld market in 1998 sold exclusively in Japan and in some parts of Hong Kong. Sales of the console were lackluster possibly due to it only being able to display monochrome graphics at a time when the Game Boy Color was already on the market. The handheld discontinued a year later, but was immediately followed up with the Neo Geo Pocket Color, which saw releases in western countries.
Mednafen can run both Neo Geo Pocket and Neo Geo Pocket Color games extremely accurately, the engine is based on Neo Pop and modified to have "ripping friendly" tools such as layer removal.