Mega Man 7/Two-Players mode
From StrategyWiki, the video game walkthrough and strategy guide wiki
When you clear the game, after the credits roll, the screen above will appear.
If you use that password and press 
and 
together with 
, a special two-players mode will start.
Each player can control either Mega Man or Bass. The two can fight against each other, and each of them can also use two special moves.
