This is a ROM hack of Rockman 2 - Dr. Wily no Nazo. Created by DHI, it modifies the original gameplay, offering a potentially altered difficulty or other changes to the original experience. While details on the exact changes are not provided here, ROM hacks often modify various elements, ranging from level design and enemy placement to boss battles and item distribution.

Rockman 2 - Dr. Wily no Nazo (Japan) [Hack by DHI v1.0] (~Rockman Exhaust)

Rockman 2 - Basic Master