Mega Man is enjoying his day until Roll falls ill with Roboenza. At first, he believes that Wily is behind the epidemic, but Wily claims that he had found the cure, only to have it stolen by eight out-of-control Robot Masters. After defeating them all, Mega Man learns that Dr. Wily actually was behind the Roboenza epidemic all along. He succumbs to Roboenza himself, but Roll gives him her saved medicine to give him the strength to defeat Wily.
When Link goes back to the castle, she expends all of her power, even losing her physical form, in order to save a dying Midna. She regains her body later only to become possessed by Ganondorf, but his influence is purged from her body by Midna with the power of the Fused Shadows. Ganondorf makes another attempt on Zelda's life soon after, but she is protected by the Light Spirits of Hyrule, who grant her the magical Light Arrows so she can assist Link in part of his final battle. With the battle won and Midna revived, Zelda and Link bid her goodbye at the Mirror of Twilight.
Three main installments, as well as one online game, were published for the PlayStation 2 (PS2). Final Fantasy X (2001) introduced full 3D areas and voice acting to the series, and was the first to spawn a direct video game sequel (Final Fantasy X-2, published in 2003). The first massively multiplayer online role-playing game (MMORPG) in the series, Final Fantasy XI, was released on the PS2 and PC in 2002, and later on the Xbox 360. It introduced real-time battles instead of random encounters. Final Fantasy XII, published in 2006, also includes real-time battles in large, interconnected playfields. The game is also the first in the main series to utilize a world used in a previous game, namely the land of Ivalice, which had previously featured in Final Fantasy Tactics and Vagrant Story.