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