Grudge! Kurogane house's longest day (second part).Energer Z appeared with Kenzo Kabuto as pilot. Pygman who appears in an hologram implies that Energer Z is looking for Zeus arm, the source of photon energy. Tsubasa appears and gets rid of Pygman's hologram and eventually his idea of handing over Zeus arm to Energer Z. Kouji activates Mazinger Z and fights off Energer Z. The two exchanges blows and fire power. Mazinger Z in the end was losing the battle and Baron Ashura convinces Tsubasa to reveal the whereabouts of Zeus arm in order to help Kouji...