Error404!Sans is a main character in the Undertale fanwork "Alphatale." Originally a skeleton named William, he gained immense power from the Mainframe via the Anti-void after Infected!Sans destroyed his home world, but the process drove him insane. He claims to be the "God of the Multiverse," though he has been defeated and killed multiple times within the Alphatale main story. He is well-known as the mentor to Error!Sans from Errortale. Appears in: Alphatale Real Name: William Species: Skeleton Gender: Male Birthday: December 20th First person: I (casual, arrogant) Second person: You (blunt) / You (derogatory) Height: 185.4 cm Weight: Approx. 53 kg Likes: Chocolate cookies Dislikes: Pranks Personality: Suffers from severe depression and is somewhat deranged. Having lost everything, he is constantly in mourning, making him extremely negative, cold, and calculating. 404 does not believe his deceased younger brother, Alpha!Sans, is still alive, but he often talks to him about his day just to vent his feelings. While 404 fundamentally desires a happy ending, he will stop at nothing to achieve his goals, sometimes forcing others into bad endings. He speaks with a composed, superior tone, often using sentence endings like "...da na," "...janai ka," and "...darou." Appearance: A skeleton wearing a blue long coat with white fur on the hood and cuffs, over a white shirt and white pants. He wears dark blue socks and white slippers adorned with several blue lines. Blue Mastery: Likely the most powerful of all Blue Attacks. As long as he has a line of sight, he can edit, manipulate, or destroy the target. Dark Blaster: A powerful Blaster designed by Astral Mother. The laser destroys all types of code—people, matter, and essence alike. Its power is enough to easily destroy the Multiverse. Mind Manipulation: Can completely control another's Soul. Primarily used to force targets into his service. God Ray: A blast fired from his fingers. It can destroy basic code, glitched code, and anomalous code. (Ineffective against artificial code made from cosmic essence or god-like code.) God Ray First Shot: The first stage of God Ray. Freezes anything touched by the blast permanently until hit by the Second Shot. God Ray Second Shot: The second stage. Unlike the standard God Ray, it can destroy almost any existence regardless of code, but it takes time to fire. Mama's Boy: Passively instills fear in anything with a Soul, regardless of 404's will. Inherited from his mother. Reincarnation: Can resurrect himself using Mainframe code when near death or killed. Fly: Capable of flight. Pixel Manipulation: Can create objects like clothes, buildings, furniture, and weapons using pixels. However, he cannot create anything larger than the Milky Way galaxy. Bone Attack: The bone attacks used by Undertale's Sans. Can also use light blue and orange bones. Law Defiance: Can defy the laws of the Multiverse to an extent. Apparently, most "Out Code" characters (those who can travel between AUs) can do this. Mainframe SOUL: Since touching the Mainframe, it has granted him strength and durability. Once an impulsive, useless power, it grew with him and now negates most attacks from weak enemies. MFTL+ Speed to Infinite Speed: Capable of crossing the entire Multiverse in seconds. By standing in absolute void, he can reach immeasurable speeds.