X possesses the physical capabilities of a man that is in the peak of physical condition. His physical abilities of strength, speed, stamina, agility, dexterity, reflexes and reactions, coordination, balance, and endurance are on par with those of Captain America. Mr. X claims to be a master of every earthly form of martial arts and some alien fighting styles including Kree and Shi'ar. Mr. X is also highly proficient with a variety of weaponry including swords, knives, staffs, and firearms. He also has an uncanny tolerance for physical pain and may be a masochist.