Rex was first introduced after the 'Death of Superman'. During the actual funeral procession, Rex, backed up by two gun toting men, try to buy the rights to Jimmy Olsen's picture of Superman dead. Olsen punches Leech in the face. The promoter then has his goons threaten to shoot Jimmy in the knees. Robin stops the incident. Rex Leech also became a favored friend of the non-powered canine Krypto and the sentient genetic life form Dubbilex. Rex and Roxy move on with their lives when they incorrectly believe Superboy to be dead. Krypto is taken in by a family friend he adores.