Irem themselves developed and published this 1990 handheld, monochrome remake of the classic Kung-Fu Master, and it is not too bad, all things considered.
Midway‘s 1977 classic, Boot Hill, actually owes it existence to another game – Taito‘s 1975 arcade game Gun Fight (aka Western Gun in Japan). Boot Hill is an authorised remake of Gun Fight.
The final Mega Man game on the Nintendo Game Boy was Capcom‘s 1994 release Mega Man V, and it is arguably the best in the series.
The fourth Game Boy Mega Man game – Mega Man IV – was published by Capcom in 1993 and continues the tradition of this tough, but highly playable, run and gun series.
Both Mega Man II and Mega Man III were published in 1992. Capcom was really knocking them out for the Game Boy in the early 1990s.