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