The Nintendo DS is one of those systems that has an amazingly rich and diverse library of games. Since it's a 32-bit system, it's an absolute 2D powerhouse. Konami truly showcased some of this handheld's capabilities with the Castlevania titles that they developed. However, Capcom was not to be outdone, they released Mega Man ZX & Mega Man ZX Advent action / platformers which absolutely rocked! While these two titles were technically amazing, I still have a soft spot for the older Mega Man Zero games which first came out on the GBA. Fortunately, all four MM Zero games are also available in the Mega Man Zero Collection for the Nintendo DS. These hold up quite well, while not technically as good as the ZX series they do seem to be a bit more fun. Did anyone here buy the Mega Man Zero Collection for the DS, or play them individually on the GBA?