Here is a full level hack for Rockman 2 which changes all the level layouts in the game. Also all the stage graphics have been edited, enemy AI has been altered, and the enemies + bosses have been redrawn.
Rockman 2 - Dr. Wily no Nazo (Japan).nes - NOINTRO
CRC32: 30B91650
MD5: 055FB8DC626FB1FBADC0A193010A3E3F
SHA-1: FB51875D1FF4B0DEEE97E967E6434FF514F3C2F2
SHA-256: DEB88223311ACA8CA566B99D4063CA29D389D939FEE455F83AFAEC97C6F0A5D1