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