As an alien resident of the Mindscape, Sleepwalker had exceptional visual abilities, being able to see over a much farther distance than an average human, as well as being able to see and follow energy trails, and see wavelength colors invisible to human eyes. Sleepwalker shares a mental link with the human Rick Sheridan that facilitates Sleepwalker's entry into Rick's mind. Instead of food, Sleepwalker fed on mental energy, needing to periodically return to Rick's mind to be able to regain his strength. When Rick appeared to be dead, Sleepwalker formed a temporary bond with a homeless man named Pike to borrow some of his mental energy, although he did this only with Pike's express permission. His training as a warrior of the Mindscape makes him skilled tracker and an expert in the combat use of his powers, and also gives him a certain amount of knowledge about various supernatural entities and the workings of the mind. Sleepwalker's presence could also strengthen the powers of psychic powers and mind-related magic, enhancing the mental abilities of Professor X, Moondragon, Jean Grey and Psylocke, enabling them to connect with the mind of every human on Earth to free the human race from mental enslavement by the Magus. Similarly, Sleepwalker's mere presence increased the power of Doctor Strange's mental spells and enabled him to imprison a mental demon released from a woman's mind by Nightmare. Continuing his supernatural 'expertise', Sleepwalker's nature also allows him to be aware of souls, allowing him to confirm that the natives of Counter-Earth did not have souls as they were nothing more than psychic manifestations created by Franklin Richards; he was also able to confirm that Jim Hammond had a soul despite his artificial origin.