I'm pretty sure this game never saw a release in any of the Americas. The US is part of the North America region. And for instance, I'm pretty sure the SNES was released in Canada, which is not part of the US.
This is a hack for the JP version of Megaman called Rockman 2 - Dr. Wily no Nazo. The hack changes the weapons, bosses (not sprites), level graphics, and level layout.
ROM / ISO Information:
Rockman 2 - Dr. Wily no Nazo (J) [!].nes - GOODNES 3.14
