In the Mindscape, a world where strange creatures live that borders on the minds of all intelligent life, there is a force of beings that protect the sleeping minds of humans. For if they were not protected, dangerous beings would enter the minds of sleeping humans. One of the beings that protects the human minds, what humans call 'Sleepwalker', was tricked by his enemy, Cobweb, into entering the mind of Rick Sheridan. After confronting Sleepwalker in many of his dreams, Rick tore off Sleepwalker's Imaginator. This caused Sleepwalker and Rick to bond together. Now, whenever Rick Sheridan goes to sleep, Sleepwalker materializes into reality. Rick and Sleepwalker have agreed that when Sleepwalker comes out, he fights crime.
Sleepwalker was created by Bob Budiansky and Bret Blevins in 1991 and first appeared in Sleepwalker # 1.
Major Story Arcs
Sleepwalker has fought a wide array of villains, from the billiard based Eightball, to Crimewave, to the Chain Gang. In the Infinity War, Sleepwalker helped channel the minds of Professor X, Jean Grey, Moondragon, and Psylocke. During the battle against the evil doppelgangers that Magus made, Sleepwalker fought some of the evil clones and saved some citizens. Sleepwalker also impersonated his own doppelganger. During the Infinity Crusade, he was captured by Goddess and brought to the 'Counter-Earth'.
Cobweb wanted to finally defeat Sleepwalker so he devised a plan. Cobweb would disguise his minions as Sleepwalker's race and make everyone believe that Sleepwalker was their leader. Then, everybody would hate Sleepwalker. The plan went into action. Sleepwalker and the Avengers stopped the invasion, but the public still believed that Sleepwalker was the leader of a race that was going to try to take over. Cobweb attacked again, but Sleepwalker defeated him for good, banishing him. Sleepwalker seemingly died afterwards. It was soon revealed that Sleepwalker did not die, he was only trapped inside Rick Sheridan's mind.
Return and the Initiative
He returns back to the real world and is investigating the damages of an explosion perpetuated by the Ringmaster, but he got sucked back again in Rick Sheridan's mind. He later becomes part of a team assembled by Ms. Marvel for the Avengers Initiative which consist of himself and Machine Man in search of the missing heroines including Carol's apprentice, Araña. After they found her, Sleepwalker remains with the Initiative for some time before leaving once again to unknown places.
Powers and Abilities
Sleepwalker has super strength, enhanced durability, resistance to injury and mental attacks, and flight. Sleepwalker has the Warp Gaze, a vision- based power, just like Ghost Rider's "Penance Stare". This weapon alters the physical condition of an object and can be manipulated by Sleepwalker in whatever he likes to. As a law enforcer of the mindscape, he is sworn not to use it any living entity, because it can cause extreme pain to the organism. He also has an amplifying effect on mental powers by being nearby.
On Earth-6215 Sleepwalker has been separated from Rick Sheridan, and is a member of the League of Losers. He takes control of peoples dreams and uses them to alter reality.
In the Ultimate Universe, Sleepwalker are creatures that police the "mindscape" dimension, where the Shadow King originated.