Do you want to compare John Grey with Colossal Boy? Discover the powers, weakness & weapons of John Grey and Colossal Boy from John Grey Biography and Colossal Boy Biography. Find out all about John Grey and Colossal Boy.# Check out how is John Grey unique and distinct from Colossal Boy. Discover their love interest, sidekicks, family tree and the movies and games list in which John Grey and Colossal Boy have appeared. Find out everything about them here!