In this this re-release on the Nintendo DS contains the entire Mega Man Zero series, which also includes extras and a new gameplay option of playing through each of the four games at an easi... Read allIn this this re-release on the Nintendo DS contains the entire Mega Man Zero series, which also includes extras and a new gameplay option of playing through each of the four games at an easier difficulty.In this this re-release on the Nintendo DS contains the entire Mega Man Zero series, which also includes extras and a new gameplay option of playing through each of the four games at an easier difficulty.