Lets talk about Mega Man ZX Advent NDS

Mega Man ZX Advent follows two heroes, Grey and Ashe, on two separate but intertwining adventures as they search for answers amidst a chaotic war between humans and robots. They will fight against a menacing, evil force in a battle unprecedented in the Mega Man series.
The title takes full advantage of the Nintendo DS features to enhance the action-packed gameplay and story line of the popular series. A dynamic “Biometal” system is central to gameplay, allowing players the ability to change into several forms, including eight bosses, each with a variety of unique abilities and powers. With a touch of the Nintendo DS screen, players can easily switch back and forth between the Biometal and Map navigation screens. Bosses can be fought in several different ways, testing players’ skills and rewarding them with nearly 24 different items depending on how they take on a boss. Further gameplay options are available as players explore and open up new areas of the map.