Watch Wonder Boy! for Free: How to Stream the Movie Online at 123Movies. . Ten-year-old Adam suffers from Juvenile Arthritis. To cope with the daily struggles of his illness Adam draws comics and retreats into his imagination. As the courageous Wonder Boy! Adam fights alongside the heroic Captain Wonder against the notoriously evil Dr. Itis. As Adam’s illness progresses both reality and fantasy collide, and he must find the inner strength to overcome both his illness and the evil Dr. Itis before it’s too late.