Dragon Ball ZDr. Gero vs. Yamcha Dr. Gero vs. Piccolo Dr. Gero vs. Piccolo Dr. Gero and Android 19 vs. Goku (Super Saiyan) (Goku's nightmare; anime only) Dr. Gero vs. Krillin (anime only) Dr. Gero vs. Android 17Dragon Ball GTDr. Gero vs. Pan...