A Robot That Only We Can Build
As Kaito determines the Kill-Ballad cheater, a strange electrically-charged stone called a monopole falls from the sky and lands before him. As Akiho theorizes she could use more of them to power the GunBuild-1, Subaru suggests she give up and work on a new robot with JAXA. The next day, as the gang meet with Nae to try and convince JAXA to work on the GunBuild-1, Subaru's brings up a report on the failures of the first run, suggesting how they could build a new improved robot, also taking aboard a suggestion by Junna to use augmented reality to give it the appearance of Gunvarrel when viewed through a Poke-Com, thus eliminating the need for extra weight. After realizing that building a new robot doesn't change her original dream, Akiho gets on board to prepare the new robot, GunBuild-2, for the expo. Meanwhile, Mizuka is seen talking to Airi, telling her to disappear.
Aired 14/12/2012EP 10 - A Robot That Only We Can Build

Robotics;Notes
2019, Divergence Ratio 1.048596 (Steins Gate worldline). The near future, where a device popularly called the PokeCom, packaged with PhoneDroid OS, spreads, bringing the Augmented Reality world close to existence.
Central Tanegashima High School's Robot Research Club is in danger of losing its club status. Kaito Yashio, one of only two members, is only obsessed with robot fighting games, showing no interest in the Robo Club even in this situation. The reckless, useless club head, Akiho Senomiya, aims to complete a giant robot, struggling hard to avoid losing the club's status.
Then, one day, Kaito discovers the A.R. annotation that becomes the Kimijima Report. Written in that report is the indictment of someone named Kou Kimijima's conspiracy involving the world.
(Source: VNdb)