Mega Rock Powered Up description

In the story behind the original series, Mega. is an android called Rock, created as a lab assistant by the scientist Dr. Light with Dr Wily as his assistant.
Following treachery by Dr. Wily in which he reprogrammed all of Dr Light's robots,
Rock was converted into a battle robot to defend the world from Wily's violent robotic threats. Thus he becomes Mega-Man.

Enemies are weak to at least one weapon; for instance, Fire Man will take more damage from Ice Man's weapon than from other weapons.
This concept draws inspiration from rock-paper-scissors.
Robot Master levels can generally be completed in any order, resulting in a strategic hallmark of the series: determining the best order to defeat bosses and earn weapons.
Sequels of Mega Rock games contain new enemies alongside familiar ones, new bosses and weapons, and perhaps new gadgets.
Later installments of the game give the player the option of commanding other player characters with different abilities, such as Proto Man, Duo, and Bass.