Here is a hack for Rockman 3 which changes all the levels and graphics in the game. Also all the stage music has changed. Also this hack uses the music from DurfarC’s hack called MM3: The Battle of Gamma.
Rockman 3 - Dr. Wily no Saigo! (Japan).nes - NOINTRO
CRC32: FCE6CEA2
MD5: 85944FB58B6AFC53F8D20B8C1E19A0AB
SHA-1: E82C532DE36C6A5DEAF08C6248AEA434C4D8A85A
SHA-256: 152133B3DE8D8EF0EC6CC879B16B5E4926FF104EDEDFB7BD512E848B330A9C70