to the island below. Mega Man Volnutt and Roll Caskett watch the events from television and decide to rescue them. With Roll's help, Mega Man makes his way to the center of the island and in the process releases a girl called Sera and her servant Geetz, both of whom go to the Sulphur Bottom. Geetz tells Bluecher and Barrel that the Mother lode can be accessed by means of four keys. Bluecher and Barrel ask Mega Man if he could retrieve the keys before the Pirates who heard their conversation with Geetz. Mega Man along with Roll set forth to find the four Keys in the Manda, Nino, Saul Kada and Calinca Ruins, while battling the Pirates, most often the Bonne Family, along the way. When Mega Man returns with the final key to the Sulphur Bottom, Sera orders Geetz to attack the ship and take the keys. Yuna appears in the ship and orders Gatz to fight Geetz. Mega Man stumbles upon Yuna, who then gives some reminder about his former life and explains to him the terrible catastrophe she was trying to prevent: Sera's plans for the execution of the "Carbon Reinitialization Program", meant to kill every human from Terra and revive the original humans. Soon after, Mega Man reaches the deck of the Sulphur Bottom and sees Gatz defeated by Geetz. Mega Man is able to defeat Geetz, who, using his last forces, seriously damages Mega Man. While recovering, Mega Man starts to explore his past. In his dreams he sees himself and a man known as "Master" going to Terra and giving Mega Man his "Genetic Code" before dying and requesting that Mega Man destroy the system that can start the Carbon Reinitialization Program. Yuna tells Mega Man to choose whether to follow what the System wants him to do or oppose it. Mega Man then takes a flight in a ship merged with Gatz heading for the planet Elysium with Yuna. In Elysium, Mega Man reaches the room where the Carbon Reinitialization Program is to be executed from. Sera then appears in the form of a robot to Mega Man and states that she did not execute the Carbon Reinitialization Program but has, instead, been waiting for Mega Man's arrival to challenge him in hopes that by defeating him she would prove that their master liked her more. In battle, Gatz tries to aid