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