Shinji Ikari hails from an alternate world separate from the main Shinkansen Henkei Robo Shinkalion setting. In this reality, he pilots specialized Shinkalion units modeled after Evangelion Unit-01: the Shinkalion 500 TYPE EVA and its advanced form, the Shinkalion Z 500 TYPE EVA. These train-based mecha integrate Eva elements, featuring armor aesthetics reminiscent of an Evangelion and a pilot uniform simplified from the plug suit design.

He crosses dimensions during operations with the Shinkansen Ultra Evolution Institute. In one instance, he arrives in a version of Tokyo-3, joining forces with protagonist Hayato Hayasugi to confront a mutual adversary. This demonstrates his effectiveness as a Shinkalion pilot, applying his biomechanical unit expertise. His role continues beyond a single episode into the second season and film continuity.

The film *The Marvelous Fast ALFA-X That Comes From the Future* features him piloting the Shinkalion Z 500 TYPE EVA. He joins drivers from across Japan to defend Earth against extraterrestrial invaders, solidifying his integration into the Shinkalion team despite his extradimensional origin. His sustained presence across the franchise makes him the sole confirmed driver of both first and second-generation Shinkalion units.

Within the Shinkalion universe, his interpersonal connections include collaborations with Hayato Hayasugi and Shin Arata. He is also accompanied by Rei Ayanami and Asuka Langley Soryu from his home dimension. These relationships position him within the ensemble cast during crossovers.