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