The destined match of Vent or Aile’s foster father, Girouette, Biometal Model Z was bequeathed to them after Giro was killed by Serpent. Using Biometal Model X’s unique Double Megamerge ability, the chosen hero will gain access to Biometal Model ZX. A fusion between Model X and Model Z, this Biometal gives either hero both X’s Buster and the Saber abilities of Z, turning them into the Ultimate Mega Man.