All 4 Mega Man Zero games together on one cartridge, optimized and enhanced for the Nintendo DS.Utilize awesome weapons such as the Z-Saber, Recoil Rod, Shield Boomerang, and Buster Shot.Play through the games just as you remember them or in the new beginner friendly "Easy Scenario" mode.Customizable button controls that allow you to play the way you're most comfortable with.Collectible wallpapers, character cards, and mod cards to unlock as you progress through the game.New "Art Gallery" feature allows you to view artwork from the Mega Man Zero series while you play.ESRB Rating: EVERYONE with Violence