This ROM hack modifies Megaman into Elecman from Megaman 1. This includes character sprites, an image in the opening story, as well as the image in the middle of the boss selection screen. Some of the text in the game is changed as well.
Mega Man 5 (USA).nes - NOINTRO
CRC32: 5E023291
MD5: D7D22BF9EDFB16469975F7F4D8DA518F
SHA-1: 1748E9B6ECFF0C01DD14ECC7A48575E74F88B778
SHA-256: 32BD2B4ECD2129AA5337AFE9171696EF35646D3FD597339AEBBA19221764521C