Here is a full game hack. All the levels have been edited and there are graphical changes as well. This patch was originally intended for Rock Man 4. If you plan on applying to Mega Man IV, please use at your own risk.
Rockman 4 - Aratanaru Yabou!! (Japan).nes - NOINTRO
CRC32: 771A9138
MD5: 8B4B65D68DEDC70A537505BDA430DAE9
SHA-1: C33C6FA5B0A5B010AF6B38CBD22252A595500A5A
SHA-256: AB4EB162A7BC84A317939B3F952314C9C7D0E6B7065210FF39322A3A13AEAA4C