The Parts called People (ヒトという部品 Hito to iu Paatsu) is the 2nd episode of the Super Robot Wars Original Generation: The Animation OVA series.
During a flashback to the Aerogater invasion, Megillots are systemically destroying a city, wiping out its inhabitants. A man is seen holding the body of a woman, grieving the loss of his wife and child. Claiming that if his ODE System was being put to use, none of this would have happened, and ends with a chilling cry...
Back on the Hagane, Gilliam explains to the crew on the origins of the ODE System. Developed by Professor Wilhelm von Juergen, formerly of the Divine Crusaders, he brought the Omni Dendro Encephalon System to Wong Heavy Industries. This networking system allows all units equipped with it to share data and information between one another. With it, an enemy's actions can be calculated and predicted, thus explaining why the Bartolls were able to outmaneuver the ATX Team's attacks. As for the woman found inside the Bartoll, the machine itself requires a living, organic core to function, and Gilliam theorizes the reason why legions of people disappeared is due to the Bartoll's need to acquire more information from their captives, through the ODE System, thereby improving their limitations. On the bridge, operator Rio Mei Long and helmsman Eita Nadaka receives a distress call from the Osaka Federation University and notifies Captain Tetsuya.
At the institution, Bartolls capture students and university staff through a gas that solidifies them, and ships them on transport units to an unknown location. The Hagane arrives at Osaka, and the ATX Team and SRX Team prepares to sortie out. However, Gilliam advises it is best if one team heads to Wong Heavy Industries' main factories and continue investigating there, while the other remains behind and deal with the Bartolls. As such, the ATX Team heads to mainland China where the factories are located, after the Hagane creates a diversion for them, while the SRX Team defends the ship and fights off Bartoll reinforcements in the area.
On their way to the factories, the ATX Team discover more Bartolls, but their attack methods are quite different from previous encounters. Both Kyosuke and Excellen recognize their patterns, concluding they have taken Lamia's piloting data into use. Similarly, the SRX Team is facing the same situation, as hordes of Bartolls swarm in, utilizing Lamia's combat skills. Backed into a corner, Captain Tetsuya allows the SRX Team to form up, and all 3 R-Units combine into the mighty Super Robot Type-X (SRX). With Villeta in the R-Gun Powered, the SRX uses the "Hyper Tronium Buster Cannon" and destroys all but a few Bartools, who escape the line of fire and retreats. Meanwhile, the ATX Team is having difficulty in breaking away from the Bartolls, until Masaki Andoh and his Cybuster appears out of nowhere, eliminating the enemy with a swift "Cyflash". Thanking his support, the team and the Cybuster heads to the factories. Reaching the outskirts of the facilities, Bullet hastily makes it to the factory grounds, but Excellen's scans find no readable life signs. Sensing a trap, Kyosuke orders to pull back immediately; sure enough, the entire area is vaporized by explosives, barely leaving any trace of evidence behind. Distraught at their inability to foresee this, the four mechs rendezvous with the recently arrived Hagane, and report the situation to the crew.
Gilliam's network of information from the Intelligence Division reports a large number of Bartolls congregating at an abandoned mining facility in satellite orbit, and intelligence indicates this is where they are operating from. However, the location dubbed Hellgate will be bombarded with nuclear weapons by the Earth Federation and the space colonies, unless the core of the facility is shut down and the Bartolls made inoperative within 180 minutes. The Hagane is the only ship closest to the Hellgate, and the crew sets out to rescue their imprisoned friends.
At the Hellgate, transported humans are screened and stored in the facility, and deep inside, Kusuha, Arado, Seolla and Latune awaken. Upon realizing they been captured by the Bartolls, they notice Lamia in the distance, physically linked to a Bartoll as an organic core. Suddenly, four Bartolls emerge, and as Kusuha lets out a blood-curling scream, they descend upon the four...