 Streaky's last pre-"Crisis on Infinite Earths" appearance was in "Adventure Comics" #394 (June 1970).When all of Earth's kryptonite was transformed into iron in "Superman" #233 (January 1971), Streaky's X-Kryptonite power source was eliminated as well, ending his super-career and returning him to the life of a normal housecat.In an answer to a reader's letter in "Supergirl" #2 (January 1973), editor E. Nelson Bridwell confirmed the elimination of X-Kryptonite and that the now-powerless Streaky had gone to live with Linda (Supergirl) Danvers' foster parents in Midvale.