Mega Man Zero 2

Set one year after the events of the first game, Neo Arcadia still actively hunts Zero, and the battle comes to a head out in the desert. Zero survives the assault, but collapses soon afterward, and is rescued (oddly) by Harpuia. He is brought back to the Resistance Base, where he meets the new leader of the Resistance, Elpizo. Zero assists in various missions against Neo Arcadia, but Elpizo becomes mad with power with the baby elves, copies of the Dark Elf. Elpizo eventually revives the Dark Elf by finding and destroying X's physical body, which acted as a seal. As Elpizo powers up with 2 baby elves and the revived Dark Elf, Zero confronts and defeats him. Elpizo is transformed to a cyber-elf and flies away, while Cyber-elf X appears, explaining the origins of the Dark Elf to Zero.