Mega Man Powered Up Unlocking Bosses: In the fancy-new mode, if you can beat a boss using only the Mega Buster/Rock Buster, you'll unlock that boss as a playable character! Play as Blues/Protoman: In challenge mode, beat all 100 challenges. Charge shot/Slide mode: Beat the game on normal difficulty. Play as Mega Man C: Beat New Style in normal mode. Play as Rockman S: Beat New Style in easy mode. Play as Mega: Beat all levels on hard mode to unlock Mega. He's the unarmed version of Mega Man and attacks with a kick.