Prairie and the Guardians, and vow to continue to work for peace and justice. Gameplay This game contains elements from both the Mega Man X series and the Mega Man Zero series. The players are on a 2-dimensional overlay map with sprites where they engage enemies to finish their mission. Missions are selected from a list, displayed on a computer. The player can freely explore the game world during and between missions, and they must find the specified area themselves. During the game, the player can use Vent or Aile to transform into different forms using Bio-Metals whose appearance and abilities are based on X, Zero, and the Four Guardians from the Mega Man Zero series, the latter four where their abilities can be used to solve puzzles and obtain special items found in the stage and also use the Nintendo DS Dual-Screen feature for an additional ability as well. The Model X form is only available at the beginning of the game until Model ZX is acquired, but with a New Game Plus it will be available for the entire game. Additionally Omega from Mega Man Zero 3 appears as a hidden boss, alongside four "Mutos Reploids" from both Zero 3 (Blazin' Flizard, Childre Inarabitta, Hellbat Schilt, and Deathtanz Mantisk) and Mega Man Zero 4, (Pegasolta Eclair, Sol Titanion, Fenri Lunaedge, and Noble Mandrago) who all each occupy a hidden room which is only accessed by inserting the GBA cartridge of either game into the Nintendo DS or Nintendo DS Lite GBA slot. After defeating all eight Mutos Reploids, and Omega himself, the player will be able to acquire a hidden item, which will later enable the player to play as Omega after beating the game once and talking to one of the NPCs. For the Mega Man Zero/ZX Legacy Collection release, the gameplay had received some minor updates, where the previous dual-screen features were placed in a small support screen which is positioned based on the setting the player chooses and the feature for unlocking the Mutos Reploids is now performed by a new Link Mode located in the main menu when accessing this game allows the player to face them by selecting either the Zero 3 or Zero 4 link to face against the 4 bosses from that respective game. The game also adds metroidvania concepts into the level design, with more exploration elements than the main